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Cockerell TDA (1895) New bees of the genus Halictus from New Mexico, U.S.A. Annals and Magazine of Natural History, Series 6 16(91): 63-69. [Halictus tripartitus Cockerell, 1895] https://doi.org/10.1080/00222939508680230

Cockerell TDA (1896) The bees of the genus Andrena found in New Mexico. Annals and Magazine of Natural History, Series 6 18(103): 78-92. https://doi.org/10.1080/00222939608680413

Cockerell TDA (1896) New North American bees. The Entomologist's Monthly Magazine 32: 218-221.

Cockerell TDA (1896) Contributions from the New Mexico biological station—I. Descriptions of new bees collected by Prof. C.H.T. Townsend in the state of Vera Cruz. Annals and Magazine of Natural History, Series 6 18(106): 282-295. [Halictus ligatus Say, 1837] https://doi.org/10.1080/00222939608680457

Cockerell TDA (1897) New and little-known North American bees. Proceedings of the Academy of Natural Sciences of Philadelphia 49: 334-355. [Osmia atrocyanea atrocyanea Cockerell, 1897, Osmia bruneri Cockerell, 1897, Osmia marginipennis Cresson, 1878, Calliopsis australior Cockerell, 1897] http://www.jstor.org/stable/4062289

Cockerell TDA (1897) Contributions from the New Mexico biological station.—III.  The bees of the genus Colletes found in New Mexico. Annals and Magazine of Natural History, Series 6 19(109): 39-52. [Colletes aberrans Cockerell, 1897, Colletes gypsicolens Cockerell, 1897, Colletes gilensis Cockerell, 1897] https://doi.org/10.1080/00222939708680506

Cockerell TDA (1898) A southern type of Andrena in Connecticut. Entomological News 9: 171-72.

Cockerell TDA (1898) New bees from New Mexico. The Canadian Entomologist 30(6): 146-148. https://doi.org/10.4039/ent30146-6

Cockerell TDA (1898) Notes on some bees of the genus Andrena from Hartford, Connecticut. The Canadian Entomologist 30(4): 103-104. https://doi.org/10.4039/ent30103-4

Cockerell TDA (1898) On some panurgine and other bees. Transactions of the American Entomological Society 25: 185-198. [Panurginus atriceps (Cresson, 1878), Andrena concinnula (Cockerell, 1898)] http://www.jstor.org/stable/25076687

Cockerell TDA (1898) New and little-known bees. The Canadian Entomologist 30(3): 50-53. [Protosmia rubifloris (Cockerell, 1898)] https://doi.org/10.4039/ent3050-3

Cockerell TDA (1898) Panurginus clypeatus. The Canadian Entomologist 30 (2): 29. [Panurginus cressoniellus Cockerell, 1898] https://doi.org/10.4039/ent3029-2

Cockerell TDA (1900) Observations on bees collected at Las Vegas, New Mexico, and in the adjacent Mountains. Annals and Magazine of Natural History, Series 7 5(29): 401-416. [Andrena helianthi Robertson, 1891, Anthidium porterae Cockerell, 1900, Osmia subaustralis Cockerell, 1900] https://doi.org/10.1080/00222930008678307

Cockerell TDA (1901a) A new bee from California. Zeitschrift für Systematische Hymenopterologie und Dipterologie 1(2): 80. [Andrena knuthiana Cockerell, 1901]

Cockerell TDA (1901b) A new Andrena from California. Entomological News 12: 74. [Andrena knuthiana Cockerell, 1901]

Cockerell TDA (1901) Some insects of the Hudsonian Zone in New Mexico—VI. Psyche 9(308): 282-287. [Andrena birtwelli Cockerell, 1901, Andrena washingtoni Cockerell, 1901] https://doi.org/10.1155/1901/483090

Cockerell TDA (1901) Some insects of the Hudsonian Zone in New Mexico—III. Psyche 9(298): 163-164. [Panurginus cressoniellus Cockerell, 1898] https://doi.org/10.1155/1901/34954

Cockerell TDA (1901) On some bees of the genus Andrena from New Jersey. Journal of the New York Entomological Society 9(3): 132-134. http://www.jstor.org/stable/25002948

Cockerell TDA (1902) Some Insects of the Hudsonian Zone in New Mexico—VIII. Psyche 9(313): 346-347. https://doi.org/10.1155/1902/58549

Cockerell TDA (1902) North-American bees of the genus Andrena. Annals and Magazine of Natural History, Series 7 9(50): 101-106. [Andrena helianthi Robertson, 1891] https://doi.org/10.1080/00222930208678552

Cockerell TDA (1902) New bees of the genus Andrena, from Wisconsin. The Canadian Entomologist 34(2): 45-47. https://doi.org/10.4039/ent3445-2

Cockerell TDA (1903) New bees from southern California and other records. Bulletin of the Southern California Academy of Sciences 2: 84-85. [Halictus tripartitus Cockerell, 1895]

Cockerell TDA (1903) North-American bees, and a new Homopteron. Annals and Magazine of Natural History, Series 7 12(70): 442-455. [Diadasia ochracea (Cockerell, 1903)] https://doi.org/10.1080/00222930308678879

Cockerell TDA (1904) New records of bees. The Entomologist 37: 231-236. [Panurginus beardsleyi (Cockerell, 1904), Sphecodes arroyanus Cockerell, 1904]

Cockerell TDA (1904) Records of American bees. The Canadian Entomologist 36(1): 13-14. [Colletes wilmattae Cockerell, 1904] https://doi.org/10.4039/ent3613-1

Cockerell TDA (1904) Descriptions and records of bees. Annals and Magazine of Natural History, Series 7 14(79): 21-30. [Heriades carinata Cresson, 1864, Brachymelecta interrupta (Cresson, 1872)] https://doi.org/10.1080/03745480409442962

Cockerell TDA (1905) New bees of the genera Osmia and Andrena. The Canadian Entomologist 37(11): 370-372. [Osmia texana Cresson, 1872] https://doi.org/10.4039/ent37370-11

Cockerell TDA (1905) The bees of southern California. Bulletin of the Southern California Academy of Sciences 4: 99-106. [Habropoda tristissima (Cockerell, 1904)]

Cockerell TDA (1905) The bees of southern California. VIII. Bulletin of the Southern California Academy of Sciences 4: 28-33. [Eucera actuosa (Cresson, 1878)]

Cockerell TDA (1906) New Rocky Mountain bees, and other notes. The Canadian Entomologist 38(5): 160-166. [Hoplitis hypocrita (Cockerell, 1906), Megachile cleomis Cockerell, 1900, Megachile texana Cresson, 1878] https://doi.org/10.4039/ent38160-5

Cockerell TDA (1906) The bees of Florissant, Colorado. Bulletin of the American Museum of Natural History 22: 419-455. [Andrena algida Smith, 1853, Andrena topazana Cockerell, 1906, Lasioglossum testaceum (Robertson, 1897), Megachile melanophaea Smith, 1853, Osmia cyaneonitens Cockerell, 1906, Nomada crawfordi Cockerell, 1905]

Cockerell TDA (1906) North American bees of the genera Andrena and Melitta in the British Museum.–I. Psyche 13: 5-10. [Andrena simplex Smith, 1853, Melitta americana (Smith, 1853)]

Cockerell TDA (1906) Descriptions and records of bees.—IX. Annals and Magazine of Natural History, Series 7 17(99): 306-317. [Colletes andrewsi Cockerell, 1906, Colletes brevicornis Robertson, 1897, Halictus confusus arapahonum Cockerell, 1906] https://doi.org/10.1080/00222930608562528

Cockerell TDA (1907) Descriptions and records of bees.—XIII. Annals and Magazine of Natural History, Series 7 19(113): 361-370. [Andrena milwaukeensis Graenicher, 1903, Osmia atrocyanea atrocyanea Cockerell, 1897, Osmia cyaneonitens Cockerell, 1906, Osmia marginipennis Cresson, 1878, Osmia subaustralis Cockerell, 1900] https://doi.org/10.1080/00222930708562656

Cockerell TDA (1907) Descriptions and records of bees.—XIV. Annals and Magazine of Natural History, Series 7 19(114): 531-540. [Andrena perarmata Cockerell, 1898, Augochlora pura pura (Say, 1837), Nomada crawfordi Cockerell, 1905] https://doi.org/10.1080/00222930709487287

Cockerell TDA (1907) The bees of Boulder County, Colorado. The University of Colorado Studies 4: 239-259. [Colletes brevicornis Robertson, 1897, Heriades carinata Cresson, 1864, Megachile melanophaea Smith, 1853]

Cockerell TDA (1907) Descriptions and records of bees.—XVI. Annals and Magazine of Natural History, Series 7 20(116): 122-132. [Andrena bradleyi Viereck, 1907, Osmia bruneri Cockerell, 1897, Osmia marginipennis Cresson, 1878] https://doi.org/10.1080/00222930709487315

Cockerell TDA (1908) New American bees.—VI. The Entomologist 41: 59-61.

Cockerell TDA (1908) New American bees.—VII. The Entomologist 41: 292-294. [Megachile subexilis Cockerell, 1908]

Cockerell TDA (1909) Descriptions and records of bees.—XXI. Annals and Magazine of Natural History, Series 8 4(19): 25-31. [Calliopsis coloradensis Cresson, 1878, Agapostemon sericeus (Forster, 1771), Hylaeus fedorica (Cockerell, 1909), Osmia subfasciata Cresson, 1872, Megachile mucida Cresson, 1878] https://doi.org/10.1080/00222930908692634

Cockerell TDA (1910) Some insects from Steamboat Springs, Colo.—II. The Canadian Entomologist 42(11): 366-370. https://doi.org/10.4039/ent42366-11

Cockerell TDA (1910) Descriptions and records of bees.—XXVI. Annals and Magazine of Natural History, Series 8 5(27): 256-264. [Andrena subtrita Cockerell,1910] https://doi.org/10.1080/00222931008692763

Cockerell TDA (1910) Descriptions and records of bees.—XXVII. Annals and Magazine of Natural History, Series 8 5(28): 361-369. [Nomada aldrichi Cockerell, 1910, Agapostemon texanus Cresson, 1872] https://doi.org/10.1080/00222931008692781

Cockerell TDA (1911) Some bees from western Canada. The Canadian Entomologist 43(1): 33-34. [Agapostemon texanus Cresson, 1872, Megachile dentitarsus Sladen, 1919] https://doi.org/http://dx.doi.org/10.4039/Ent4333-1

Cockerell TDA (1912) Descriptions and records of bees.—XLV. Annals and Magazine of Natural History, Series 8 10(55): 21-31. [Agapostemon texanus Cresson, 1872] https://doi.org/10.1080/00222931208693193

Cockerell TDA (1913) Descriptions and records of bees.—LIV. Annals and Magazine of Natural History, Series 8 12(70): 368-376. https://doi.org/10.1080/00222931308693411

Cockerell TDA (1913) Two new Canadian bees. The Canadian Entomologist 45(1): 12-14. [Sphecodes confertus Say, 1837, Sphecodes hudsoni Cockerell, 1911] https://doi.org/10.4039/ent4512-1

Cockerell TDA (1915) Descriptions and records of bees.—LXV. Annals and Magazine of Natural History, Series 8 15(87): 261-269. [Andrena milwaukeensis Graenicher, 1903] https://doi.org/10.1080/00222931508693638

Cockerell TDA (1916) Two new bees from New Jersey. Bulletin of the Brooklyn Entomological Society 11: 11. https://biostor.org/reference/169777

Cockerell TDA (1916) New and little-known bees. The Entomologist 49: 156-160. [Protosmia rubifloris (Cockerell, 1898)]

Cockerell TDA (1916) Some Rocky Mountain andrenid bees. The Canadian Entomologist 48(7): 252-254. [Andrena cyanura Cockerell, 1916] https://doi.org/10.4039/ent48252-7

Cockerell TDA (1916) Some bees from Colorado. The Entomologist 49: 100-102. [Halictus virgatellus Cockerell, 1901, Lasioglossum inconditum (Cockerell, 1916)]

Cockerell TDA (1916) Some bees in the British Museum. The Canadian Entomologist 48(8): 272-274. [Nomada aldrichi Cockerell, 1910, Nomada vernonensis Cockerell, 1916, Megachile melanophaea Smith, 1853] https://doi.org/10.4039/ent48272-8

Cockerell TDA (1916) New and little known bees from California. Pomona Journal of Entomology and Zoology 8(2): 43-64. [Coelioxys banksi Crawford, 1914]

Cockerell TDA (1918) Some halictine bees. The Entomologist 51: 261-262. [Halictus virgatellus Cockerell, 1901]

Cockerell TDA (1918) Descriptions and records of bees.—LXXIX. Annals and Magazine of Natural History, Series 9 1(2): 158-167. https://doi.org/10.1080/00222931808562297

Cockerell TDA (1919) The bees of Peaceful Valley, Colorado. Journal of the New York Entomological Society 27(4): 298-300. http://www.jstor.org/stable/25003869

Cockerell TDA (1919) The bees of Gold Hill, Colorado. The Canadian Entomologist 51(12): 271-273. [Lasioglossum occidentale (Crawford, 1902)] https://doi.org/10.4039/ent51271-12

Cockerell TDA (1922) Bees in the collection of the United States National Museum.—4. Proceedings of the United States National Museum 60: 1-20. [Nomada bella bella Cresson, 1863, Augochlora pura pura (Say, 1837), Sphecodes heraclei heraclei Robertson, 1897]

Cockerell TDA (1922) Descriptions and records of bees.—XCVI. Annals and Magazine of Natural History, Series 9 10(59): 544-550. https://doi.org/10.1080/00222932208632802

Cockerell TDA (1924) Bees of the genus Andrena in the collection of the California Academy of Sciences. The Pan-Pacific Entomologist 1(2): 57-65. [Andrena sola Viereck, 1917]

Cockerell TDA (1924) Expedition of the California Academy of Sciences to the Gulf of California in 1921. The bees (II). Proceedings of the California Academy of Sciences, Series 4 12(27): 529-560. [Agapostemon angelicus Cockerell, 1924, Agapostemon texanus Cresson, 1872, Megachile albitarsis Cresson, 1872, Megachile discorhina Cockerell, 1924] https://biostor.org/reference/77990

Cockerell TDA (1924) A bee collecting trip to Chimney Rock, Wyoming. Entomological News 35: 347-350. [Andrena cyanura Cockerell, 1916]

Cockerell TDA (1926) Descriptions and records of bees.—CXIII. Annals and Magazine of Natural History, Series 9 18(108): 621-627. [Anthidium tenuiflorae Cockerell, 1907] https://doi.org/10.1080/00222932608633558

Cockerell TDA (1927) Some North and South American bees. Annals of the Entomological Society of America 20(3): 393-400. [Andrena amphibola (Viereck, 1904)] https://doi.org/10.1093/aesa/20.3.393

Cockerell TDA (1927) Some bees, principally from Formosa and China. American Museum Novitates 274: 1-16.

Cockerell TDA (1928) A new bee of the genus Andrena visiting Senecio. Psyche 35: 62-63. [Andrena amphibola (Viereck, 1904)]

Cockerell TDA (1929) Some bees of the group Trachandrena, Robertson (Hymenoptera: Andrenidae). Annals of the Entomological Society of America 22(4): 754-758. https://doi.org/10.1093/aesa/22.4.754

Cockerell TDA (1929) New bees from the Mesa Verde National Park, Colorado. Journal of the New York Entomological Society 37(4): 441-448. [Andrena hallii Dunning, 1898] http://www.jstor.org/stable/25004332

Cockerell TDA (1929) Descriptions and records of bees.—CXIX. Annals and Magazine of Natural History, Series 10 4(21): 296-304. https://doi.org/10.1080/00222932908673058

Cockerell TDA (1930) Descriptions and records of bees.—CXXI. Annals and Magazine of Natural History, Series 10 5(25): 108-115. https://doi.org/10.1080/00222933008673111

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Cockerell TDA (1934) New or little-known western bees. The Pan-Pacific Entomologist 9(4): 153-159.

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Robertson C (1893) Notes on bees, with descriptions of new species. Transactions of the American Entomological Society 20(4): 273-276. http://www.jstor.org/stable/25076609

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Robertson C (1897) North American bees−descriptions and synonyms. Transactions of the Academy of Sciences of St. Louis 7: 315-356. [Andrena nubecula Smith, 1853, Colletes brevicornis Robertson, 1897, Agapostemon sericeus (Forster, 1771), Agapostemon splendens Lepeletier, 1841, Agapostemon texanus Cresson, 1872, Agapostemon virescens (Fabricius, 1775), Augochlora pura pura (Say, 1837), Augochlorella aurata (Smith, 1853), Halictus ligatus Say, 1837, Lasioglossum testaceum (Robertson, 1897), Sphecodes clematidis Robertson, 1897, Sphecodes confertus Say, 1837, Sphecodes heraclei heraclei Robertson, 1897, Osmia conjuncta Cresson, 1864, Macropis nuda (Provancher, 1882), Andrena nothoscordi Robertson, 1897]

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Roberts RB (1973a) Bees of Northwestern America: Agapostemon (Hymenoptera: Halictidae). Technical Bulletin of the Agricultural Experiment Station, Oregon State University 125: 1-23. [Agapostemon angelicus Cockerell, 1924, Agapostemon femoratus Crawford, 1901, Agapostemon fasciatus Crawford, 1901, Agapostemon texanus Cresson, 1872, Agapostemon obliquus (Provancher, 1888)] http://hdl.handle.net/1957/8697

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Criddle N, Curran CH, Viereck HL, Buckell ER (1924) The entomological record, 1923. Annual Report of the Entomological Society of Ontario 54: 87-102. [Andrena accepta Viereck, 1916, Andrena aliciae Robertson, 1891, Andrena bradleyi Viereck, 1907, Andrena carolina Viereck, 1909, Andrena cressonii infasciata Lanham, 1949, Andrena fragilis Smith, 1853, Andrena haynesi Viereck and Cockerell ,1914, Andrena milwaukeensis Graenicher, 1903, Andrena perarmata Cockerell, 1898, Andrena perplexa Smith, 1853, Andrena saccata Viereck, 1904, Andrena virginiana Mitchell, 1960, Andrena washingtoni Cockerell, 1901, Andrena wheeleri Graenicher, 1904, Perdita bruneri Cockerell, 1897, Perdita swenki Crawford, 1915, Colletes andrewsi Cockerell, 1906, Colletes willistoni Robertson, 1891, Agapostemon sericeus (Forster, 1771), Agapostemon splendens Lepeletier, 1841, Augochlora pura pura (Say, 1837), Halictus farinosus, Smith, 1853, Lasioglossum cooleyi (Crawford, 1906), Sphecodes clematidis Robertson, 1897, Sphecodes davisii Robertson, 1897, Anthidium porterae Cockerell, 1900, Coelioxys banksi Crawford, 1914, Hoplitis producta producta (Cresson, 1864), Hoplitis robusta (Nylander, 1848), Megachile parallela Smith, 1853, Osmia californica Cresson, 1864, Osmia georgica Cresson, 1878, Stelis monticola Cresson, 1864, Stelis ricardonis Cockerell, 1912, Colletes aestivalis Patton, 1879, Andrena concinnula (Cockerell, 1898), Eucera actuosa (Cresson, 1878), Perdita affinis Cresson, 1878, Anthidium maculifrons Smith, 1854, Nomada scita Cresson, 1878, Augochloropsis viridula (Smith, 1853), Megachile subexilis Cockerell, 1908]

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Webb DW (1980) Primary insect types in the Illinois Natural History Survey Collection, exclusinve of the Collemboa and Thysanoptera. Illinois Natural History Survey Bulletin 32(2): 55-191. [Andrena macoupinensis Robertson, 1900, Bombus huntii Greene, 1860, Epeolus autumnalis Robertson, 1902, Colletes latitarsis Robertson, 1891, Hylaeus nelumbonis (Robertson, 1890), Agapostemon virescens (Fabricius, 1775), Lasioglossum testaceum (Robertson, 1897), Anthidium psoraleae Robertson, 1902, Chelostoma philadelphi (Robertson, 1891), Heriades carinata Cresson, 1864, Heriades leavitti Crawford, 1913, Macropis nuda (Provancher, 1882)]

Crawford JC (1913) Some bees from New Brunswick, with description of a new species of Heriades. The Canadian Entomologist 45(8): 269-273. [Andrena canadensis Dalla Torre, 1896, Perdita octomaculata (Say, 1824), Augochlorella aurata (Smith, 1853), Heriades leavitti Crawford, 1913, Hoplitis producta producta (Cresson, 1864), Megachile melanophaea Smith, 1853, Osmia atriventris Cresson, 1864, Macropis nuda (Provancher, 1882)] https://doi.org/10.4039/Ent45269-8

Criddle N (1926) The entomological record, 1925. Annual Report of the Entomological Society of Ontario 56: 94-107. [Panurginus beardsleyi (Cockerell, 1904), Nomada bella bella Cresson, 1863, Agapostemon femoratus Crawford, 1901, Megachile perihirta Cockerell, 1898, Macropis nuda (Provancher, 1882), Andrena concinnula (Cockerell, 1898)]

Ainslie C (1937) Notes on the biology of two panurgine bees. The Canadian Entomologist 69(5): 97-100. [Holcopasites calliopsidis calliopsidis (Linsley, 1943)] https://doi.org/10.4039/Ent6997-5

Albarda W, Bijleveld RT, Career AW Jr, Dreessens WH, Everts EJG, Groll HW, van Zouteveen HHH, Kinker J, Leesberg AFA, van Leeuwen J Jr, Lodeesen JW, Maitland RT, Piaget E, Ritsema C, Swierstra KN, Veth PJ, Veth HJ, van der Wulp FM. (1880) Verslag van de Dertiende Wintervergadering der Nederlandsche Entomologische Vereeniging, Gehouden te Leiden op Zondag 28 December 1879, des morgens ten 11 ure. Tijdschrift voor entomologie 23: lxxxvi-xcix. [Anthophora bomboides solitaria Ritsema, 1880]

LaBerge WE, Ribble DW (1966) The nests and larvae of two species of Agapostemon (Hymenoptera: Halictidae). Journal of the Kansas Entomological Society 39(3): 467-472. [Agapostemon sericeus (Forster, 1771), Agapostemon splendens Lepeletier, 1841] http://www.jstor.org/stable/25083542

Day MC, Fitton MG (1977) Discovery in the Linnaean collection of type-material of insects described by Johann Reinhold Forster, with notes on the Hymenoptera. Biological Journal of the Linnean Society 9: 31-43. [Agapostemon sericeus (Forster, 1771)] https://doi.org/10.1111/j.1095-8312.1977.tb00257.x

Patenaude A (2007) Diversity, composition, and seasonality of wild bees (Hymenoptera: Apoidea) in a northern mixed-grass prairie preserve. Master’s thesis. University of Manitoba, Winnipeg, Manitoba, Canada. [Agapostemon sericeus (Forster, 1771), Agapostemon splendens Lepeletier, 1841, Agapostemon texanus Cresson, 1872, Augochlorella aurata (Smith, 1853), Halictus parallelus Say, 1837, Anthidium clypeodentatum Swenk, 1914]

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Lincoln PG (1981) Phylogeny, Host Plant Relations and Speciation in Genus Dufourea (Hymenoptera; Apoidea). Ph.D. Thesis, University of California, Santa Cruz. 307 pp.

Onuferko TM, Sheffield CS (2022) A new species of Epeolus Latreille, 1802 (Hymenoptera: Apidae) from western North America. Insecta Mundi 940: 1-12. [Epeolus emiliae Onuferko and Sheffield, 2022] https://journals.flvc.org/mundi/article/view/131328

Brumley RL (1965) A revision of the bee genus Epeolus Latreille of western America North of Mexico. MSc Thesis. Utah State University, Logan, iii + 92 pp. [Epeolus ainsliei Crawford, 1932, Epeolus americanus (Cresson, 1878), Epeolus autumnalis Robertson, 1902]

Onuferko TM (2017) Cleptoparasitic bees of the genus Epeolus Latreille (Hymenoptera: Apidae) in Canada. Canadian Journal of Arthropod Identification No. 30: 1-62. [Epeolus ainsliei Crawford, 1932, Epeolus americanus (Cresson, 1878), Epeolus autumnalis Robertson, 1902] https://doi.org/10.3752/cjai.2017.30

Onuferko TM (2018) A revision of the cleptoparasitic bee genus Epeolus Latreille for Nearctic species, north of Mexico (Hymenoptera, Apidae). ZooKeys 755: 1-185. [Epeolus ainsliei Crawford, 1932, Epeolus americanus (Cresson, 1878), Epeolus autumnalis Robertson, 1902, Colletes howardi Swenk, 1925] https://doi.org/10.3897/zookeys.755.23939

Wolf AT, Ascher JS (2009) Bees of Wisconsin (Hymenoptera: Apoidea: Anthophila). Great Lakes Entomologist 41: 129-168.

Cockerell TDA (1909) Two new bees. The Canadian Entomologist 41(1): 35-37. [Nomada snowii Cresson, 1878] https://doi.org/10.4039/Ent4135-1

Swenk MH (1915) Studies of North American bees III. Families Nomadidae and Stelididae. University Studies of the University of Nebraska 15(2): 155-193. [Nomada snowii Cresson, 1878, Anthidiellum robertsoni (Cockerell, 1904), Nomada subnigrocincta Swenk, 1915]

Broemeling DK (1988) A revision of the Nomada subgenus Nomadita of North America (Hymenoptera: Anthophoridae). The Pan-Pacific Entomologist 64(4): 321-344. [Nomada aquilarum Cockerell, 1903, Nomada snowii Cresson, 1878] https://biostor.org/reference/244662

Cresson ET (1916) The Cresson types of Hymenoptera. Memoirs of the American Entomological Society 1: 1-141. [Andrena nevadensis (Cresson, 1879), Calliopsis coloradensis Cresson, 1878, Calliopsis scitula scitula (Cresson, 1878), Bombus auricomus (Robertson, 1903), Bombus neoboreus Sladen, 1919, Epeolus americanus (Cresson, 1878), Holcopasites pulchellus (Cresson, 1878), Melecta (Melecta) pacifica fulvida Cresson, 1879, Melecta (Melecta) thoracica Cresson, 1875, Nomada bella bella Cresson, 1863, Nomada snowii Cresson, 1878, Brachymelecta californica (Cresson, 1878), Colletes americanus Cresson, 1868, Anthidium emarginatum (Say, 1824), Heriades carinata Cresson, 1864, Hoplitis albifrons argentifrons (Cresson, 1864), Megachile fortis Cresson, 1872, Megachile gemula gemula Cresson, 1878, Megachile gentilis Cresson, 1872, Megachile mellitarsis Cresson, 1878, Megachile mendica Cresson, 1878, Megachile subnigra Cresson, 1879, Megachile texana Cresson, 1878, Osmia atriventris Cresson, 1864, Osmia bella Cresson, 1878, Osmia georgica Cresson, 1878, Anthidium formosum Cresson, 1878, Eucera (Synhalonia) lepida (Cresson,1878), Megachile nevadensis Cresson, 1879, Brachymelecta interrupta (Cresson, 1872), Anthidium maculifrons Smith, 1854, Nomada vegana Cockerell, 1903, Nomada suavis Cresson, 1878, Osmia subfasciata Cresson, 1872, Protandrena illinoiensis (Cresson, 1878), Megachile mucida Cresson, 1878, Megachile gemula vancouveriensis Provancher, 1888 ]

Rodeck HG (1949) North American bees of the genus Nomada, subgenus Callinomada (Hymenoptera: Apoidea). Annals of the Entomological Society of America 42(2):174-186. [Nomada aquilarum Cockerell, 1903, Nomada snowii Cresson, 1878] https://doi.org/10.1093/aesa/42.2.174

Cockerell TDA (1903) New American Hymenoptera, mostly of the genus Nomada. Annals and Magazine of Natural History, Series 7 12(68): 200-214. [Nomada aquilarum Cockerell, 1903] http://dx.doi.org/10.1080/00222930308678841

Swenk MH (1913) Studies of North American bees I. Family Nomadidae. Univeristy Studies of the University of Nebraska 12(1): 1-113. [Nomada aquilarum Cockerell, 1903, Nomada alpha Cockerell, 1905, Nomada crawfordi Cockerell, 1905, Nomada bisignata Say, 1824, Nomada scita Cresson, 1878, Nomada vegana Cockerell, 1903]

Droege S, Rightmyer MG, Sheffield CS, Brady SG (2010) New synonymies in the bee genus Nomada from North America (Hymenoptera: Apidae). Zootaxa 2661: 1-32. [Nomada bethunei Cockerell, 1903, Nomada tiftonensis Cockerell, 1903, Nomada fervida Smith, 1854]

Cockerell TDA (1903) North American bees of the genus Nomada. Proceedings of the Academy of Natural Sciences of Philadelphia 55: 580-614. [Nomada bethunei Cockerell, 1903, Nomada tiftonensis Cockerell, 1903, Nomada fervida Smith, 1854, Nomada scita Cresson, 1878, Nomada vegana Cockerell, 1903, Nomada electella Cockerell, 1903] https://www.jstor.org/stable/4062915

Smith F (1854) Catalogue of Hymenopterous Insects in the Collection of the British Museum, Part II, Apidae. London: Taylor and Francis. [Bombus kirbiellus Curtis, 1835, Chelostoma rapunculi (Lepeletier, 1841), Anthidium maculifrons Smith, 1854]

Cockerell TDA (1904) The bees of southern California. VI. Bulletin of the Southern California Academy of Sciences 3: 159-162. [Habropoda tristissima (Cockerell, 1904)]

Brooks RW (1988) Systematics and phylogeny of anthophorine bees (Hymenoptera; Anthophoridae: Anthophorini). The University of Kansas Science Bulletin 53(9): 437-575. [Habropoda miserabilis Cresson, 1878, Anthophora abrupta Say, 1837, Habropoda tristissima (Cockerell, 1904)]

Lutz FE, Cockerell TDA (1920) Notes on the distribution and bibliography of North American bees of the families, Apidae, Meliponidae, Bombidae, Euglossidae, and Anthophoridae. Bulletin of the American Museum of Natural History 42(15): 491-641. [Diadasia diminuta (Cresson, 1878), Ptilothrix bombiformis (Cresson, 1878), Habropoda tristissima (Cockerell, 1904)] https://doi.org/10.5962/bhl.title.17909

Fowler C (1899b) The Habropoda and Didasia of California. The Canadian Entomologist 31(1): 283-286. [Habropoda depressa Fowler, 1899, Eucera actuosa (Cresson, 1878)] https://doi.org/10.4039/Ent31283-10

Cresson ET (1878) Descriptions of new species of North American bees. Proceedings of the Academy of Natural Sciences of Philadelphia 30: 181-221. [Bombus kirbiellus Curtis, 1835, Diadasia australis australis (Cresson, 1878), Diadasia diminuta (Cresson, 1878), Habropoda miserabilis Cresson, 1878, Eucera actuosa (Cresson, 1878), Eucera (Synhalonia) lepida (Cresson,1878), Ptilothrix bombiformis (Cresson, 1878), Anthophora affabilis Cresson, 1878]

Cockerell TDA (1909) Descriptions of some bees in the U.S. National Museum. Proceedings of the United States National Museum 36(1674): 411-420. [Habropoda miserabilis Cresson, 1878] https://doi.org/10.5479/si.00963801.36-1674.411

Cockerell TDA (1905) Three new bees from the southwest. Entomological News 16(3): 81-83. [Habropoda murihirta (Cockerell, 1905)]

Stainer J (1959) A collection of Hymenoptera from British Columbia. Proceedings of the Entomological Society of British Columbia 56: 65-66. [Habropoda murihirta (Cockerell, 1905), Halictus virgatellus Cockerell, 1901]

Cresson ET (1869) A list of the North American species of the genus Anthophora, with descriptions of new species. Transactions of the American Entomological Society 2: 289-293. [Anthophora walshii Cresson, 1869] http://www.jstor.org/stable/25076210

Cruden RW, Hermanutz L, Shuttleworth J (1984) The pollination biology and breeding system of Monarda fistulosa (Labiatae). Oecologia 64: 104-110. [Anthophora walshii Cresson, 1869] https://doi.org/10.1007/BF00377551

Wrigley RE, Westwood R, Murray C, Olynyk M, de March L (2021) Arthropod survey at Fort Ellice, Manitoba. Newsletter of the Biological Survey of Canada 40: 18-25. [Lasioglossum admirandum (Sandhouse, 1924)]

Cockerell TDA, Sandhouse G (1924) Parasitic bees (Epeolinae and Melectinae) in the collection of the California Academy of Sciences. Proceedings of the California Academy of Sciences, Series 4 13(19): 305-324. [Brachymelecta californica (Cresson, 1878)]

Fox WJ (1893) Synopsis of the North American species of Melecta. Entomological News 4: 143-144. [Brachymelecta californica (Cresson, 1878)]

Hurd PD, Linsley EG (1951) The melectine bees of California (Hymenoptera: Anthophoridae). Bulletin of the California Insect Survey 1(5): 119-140. [Melecta (Melecta) pacifica fulvida Cresson, 1879, Melecta (Melecta) separata callura (Cockerell, 1926), Melecta (Melecta) thoracica Cresson, 1875, Brachymelecta californica (Cresson, 1878), Brachymelecta interrupta (Cresson, 1872)]

Linsley EG (1939) A revision of the Nearctic Melectinae. Annals of the Entomologcal Society of America 32(2): 429-468. [Melecta (Melecta) pacifica fulvida Cresson, 1879, Melecta (Melecta) separata callura (Cockerell, 1926), Melecta (Melecta) thoracica Cresson, 1875, Brachymelecta californica (Cresson, 1878), Melecta (Melecta) pacifica pacifica Cresson, 1878, Brachymelecta interrupta (Cresson, 1872)] https://doi.org/10.1093/aesa/32.2.429

Onuferko TM, Packer L, Genaro JA (2021) Brachymelecta Linsley, 1939, previously the rarest North American bee genus, was described from an aberrant specimen and is the senior synonym for Xeromelecta Linsley, 1939. European Journal of Taxonomy 754: 1-51. [Brachymelecta californica (Cresson, 1878)] https://doi.org/10.5852/ejt.2021.754.1393

Rozen JG (1969) The larvae of the Anthophoridae (Hymenoptera, Apoidea) Part 3. The Melectini, Ericrocini, and Rhathymini. American Museum Novitates 2382: 1-24. [Zacosmia maculata maculata (Cresson, 1879)]

Rozen JG (1991) Evolution of cleptoparasitism in anthophorid bees as revealed by their mode of parasitism and first instars (Hymenoptera: Apoidea). American Museum Novitates 3029: 1-36. [Zacosmia maculata maculata (Cresson, 1879)]

Torchio PF (1971) The biology of Anthophora (Micranthophora) peritomae Cockerell (Hymenoptera: Apoidea, Anthophoridae). Los Angeles Museum Contributions in Science 206: 1-14. [Zacosmia maculata maculata (Cresson, 1879)]

Torchio, PF, Youssef NN (1968) The biology of Anthophora (Micranthophora) flexipes and its cleptoparasite, Zacosmia maculata, including a description of the immature stages of the parasite. Journal of the Kansas Entomological Society 41(3): 289-302. [Zacosmia maculata maculata (Cresson, 1879)] https://www.jstor.org/stable/25083713

Hurd PD (1979) Introduction. Pgs. vii-xxx. In Krombein KV, Hurd PD Jr, Smith DR. Catalog of Hymenoptera in America North of Mexico. Volume 3. Indexes. Smithsonian Institution Press, Washington, DC. [Melecta (Melecta) pacifica fulvida Cresson, 1879, Zacosmia maculata maculata (Cresson, 1879)]

Crawford JC (1906) Three new species of bees. The Canadian Entomologist 38(8): 282-284. [Perdita bruneri Cockerell, 1897, Holcopasites pulchellus (Cresson, 1878), Agapostemon texanus Cresson, 1872] https://doi.org/10.4039/Ent38282-8

Hurd PD, Linsley EG (1972) Parasitic bees of the genus Holcopasites Ashmead (Hymenoptera: Apoidea). Smithsonian Contributions to Zoolology 114: 1-41. [Holcopasites calliopsidis calliopsidis (Linsley, 1943), Holcopasites illinoiensis (Robertson, 1891), Holcopasites pulchellus (Cresson, 1878), Holcopasites stevensi Crawford, 1915]

Linsley EG (1943) A revision of the genus Neopasites (Hymenoptera: Nomadidae). Transactions of the American Entomological Society 69(2/3): 119-140. [Holcopasites calliopsidis calliopsidis (Linsley, 1943), Holcopasites illinoiensis (Robertson, 1891), Holcopasites pulchellus (Cresson, 1878)] https://www.jstor.org/stable/25077508

Linsley EG, MacSwain JW, Smith RF (1956) Association of Holcopasites with Pseudopanurgus in Mexico (Hymenoptera: Anthophoridae, Andrenidae). The Pan-Pacific Entomologist 32: 82. [Holcopasites pulchellus (Cresson, 1878)]

Linsley EG (1944) New species of Neopasites with notes concerning others (Hymenoptera, Nomadidae). Journal of the New York Entomological Society 52: 277-280. [Holcopasites stevensi Crawford, 1915]

Rozen JG (1965) Biological notes on the cuckoo bee genera Holcopasites and Neolarra (Hymenoptera: Apoidea). Journal of the New York Entomological Society 73: 87-91. [Holcopasites stevensi Crawford, 1915]

Hefetz A, Eickwort GC, Blum MS, Cane J, Bohart GE (1982) A comparative study of the exocrine products of cleptoparasitic bees (Holcopasites) and their hosts (Calliopsis) (Hymenoptera: Anthophoridae, Andrenidae). Journal of Chemical Ecology 8(11): 1389-1397. [Holcopasites calliopsidis calliopsidis (Linsley, 1943)] https://doi.org/10.1007/BF01403102

Rozen JG (1966) The larvae of the Anthophoridae (Hymenoptera: Apoidea). Part 2. The Nomadidae. American Museum Novitates 2244: 1-38. [Holcopasites calliopsidis calliopsidis (Linsley, 1943)]

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Cockerell TDA (1903) A catalogue of the bees of California. Psyche 10: 74-78. [Diadasia ochracea (Cockerell, 1903)]

Cockerell TDA (1904) The bees of southern California. II. Bulletin of the Southern California Academy of Sciences 3: 23-24. [Dianthidium singulare (Cresson, 1879)]

Cockerell TDA (1904) The bees of southern California. III. Bulletin of the Southern California Academy of Sciences 3: 56-60. [Anthidium utahense Swenk, 1914, Anthidium atrifrons Cresson, 1868, Anthidium banningense Cockerell, 1904]

Cockerell TDA (1904) The bees of southern California. IV. Bulletin of the Southern California Academy of Sciences 3: 72-76. [Anthidium atrifrons Cresson, 1868]

Cockerell TDA (1904) The bees of southern California. V. Bulletin of the Southern California Academy of Sciences 3: 86-90. [Xylocopa sonorina Smith, 1874]

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Schwarz HF (1927) North American bees of the genus Anthidium. American Museum Novitates 252: 1-22. [Anthidium clypeodentatum Swenk, 1914, Anthidium banningense Cockerell, 1904]

Schwarz HF (1927) Notes on some anthidiine bees of Montana and California. American Museum Novitates 277: 1-8.

Schwarz HF (1940) A key to the known anthidiine bees of Oregon, with description of some new forms. American Museum Novitates 1058: 1-8. [Anthidium tenuiflorae Cockerell, 1907, Anthidium formosum Cresson, 1878]

Timberlake PH (1943) Racial differentiation in Nearctic species of Dianthidium (Hymenoptera, Apoidea). Journal of the New York Entomological Society 51(2): 71-110. [Dianthidium singulare (Cresson, 1879)] http://www.jstor.org/stable/25005000

Cockerell TDA (1907) New anthidiine bees from Colorado. The Canadian Entomologist 39(4): 135-136. [Anthidium porterae Cockerell, 1900, Anthidium tenuiflorae Cockerell, 1907] https://doi.org/10.4039/Ent39135-4

Cresson ET (1868) Catalogue of a small collection of Hymenoptera made in New Mexico during the summer of 1867. Transactions of the American Entomological Society 1: 375–388. [Anthidium atrifrons Cresson, 1868] https://doi.org/10.2307/25076186

Cresson ET (1878) Descriptions of new North American Hymenoptera in the collection of the American Entomological Society. Transactions of the American Entomological Society 7: 61–136. [Anthidium emarginatum (Say, 1824), Anthidium palliventre Cresson, 1878, Megachile gemula gemula Cresson, 1878, Anthidium atrifrons Cresson, 1868] http://www.jstor.org/stable/25076368

Gonzalez VH, Griswold TL (2013) Wool carder bees of the genus Anthidium in the Western Hemisphere (Hymenoptera: Megachilidae): diversity, host plant associations, phylogeny, and biogeography. Zoological Journal of the Linnean Society 168: 221-425. [Anthidium clypeodentatum Swenk, 1914, Anthidium palliventre Cresson, 1878, Anthidium porterae Cockerell, 1900, Anthidium psoraleae Robertson, 1902, Anthidium tenuiflorae Cockerell, 1907, Anthidium utahense Swenk, 1914, Anthidium formosum Cresson, 1878, Anthidium atrifrons Cresson, 1868, Anthidium banningense Cockerell, 1904, Anthidium maculifrons Smith, 1854] https://doi.org/10.1111/zoj.12017

Griswold T, Gonzalez VH, Ikerd H (2014) AnthWest, occurrence records for wool carder bees of the genus Anthidium (Hymenoptera, Megachilidae, Anthidiini) in the Western Hemisphere. ZooKeys 408: 31-49. [Anthidium atrifrons Cresson, 1868] https://doi.org/10.3897/zookeys.408.5633

Swenk MH (1914) Studies of North American bees. II. Family Stelididae. University Studies of the University of Nebraska 14(1): 1-36. [Anthidium emarginatum (Say, 1824), Anthidium porterae Cockerell, 1900, Anthidium utahense Swenk, 1914, Stelis rubi Cockerell, 1898, Anthidium atrifrons Cresson, 1868]

Jaycox ER (1967) Territorial behavior among males of Anthidium banningense (Hymenoptera: Megachilidae). Journal of the Kansas Entomological Society 40(4): 565-570. http://www.jstor.org/stable/25083662

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Cockerell TDA (1925) Descriptions and records of bees.—CVII. Annals and Magazine of Natural History, Series 9 16(96): 621-629. [Anthidium emarginatum (Say, 1824)] https://doi.org/10.1080/00222932508633354

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Hicks CH (1926) Nesting habits and parasites of certain bees of Boulder County, Colorado. University of Colorado Bulletin 15: 217-252. [Anthidium emarginatum (Say, 1824), Anthidium porterae Cockerell, 1900, Anthidium tenuiflorae Cockerell, 1907, Hoplitis fulgida (Cresson, 1864), Hoplitis hypocrita (Cockerell, 1906), Hoplitis producta producta (Cresson, 1864), Hoplitis sambuci Titus, 1904, Osmia texana Cresson, 1872, Stelis monticola Cresson, 1864]

Keating WH (ed) Narrative of an expedition to the source of St. Peter’s River, Lake Winnepeek, Lake of the Woods, &c. &c. Performed in the year 1823, by order of the Hon. J. C. Calhoun, Secretary of War, Under the Command of Stephen H. Long, Major U.S.T.E. Vol. II. Philadelphia, USA: H.C. Carey & I. Lea—Chesnut Street, 253–378. [T. Say prepared the Appendix. Part I.— 1. Zoology] [Perdita octomaculata (Say, 1824), Anthidium emarginatum (Say, 1824), Nomada bisignata Say, 1824]

Titus ESG (1902) Three new Anthidiinae from Colorado. Entomological News 13: 169-171. [Anthidium formosum Cresson, 1878]

Parker FD (1987) Nests of Callanthidium from block traps (Hymenoptera: Megachilidae). The Pan-Pacific Entomologist 63(2): 125-129. [Anthidium formosum Cresson, 1878]

Cockerell TDA (1949) Bees from Central America, principally Honduras. Proceedings of the United States National Museum 98(3233): 429-490. [Halictus ligatus Say, 1837, Anthidium maculifrons Smith, 1854]

Griswold TL, Michener CD (1988) Taxonomic observations on Anthidiini of the Western Hemisphere (Hymenoptera: Megachilidae). Journal of the Kansas Entomological Society 61(1): 22-45. [Anthidium maculifrons Smith, 1854] http://www.jstor.org/stable/25084960

Cockerell TDA (1912) Two bees new to Canada. The Canadian Entomologist 44(10): 293. [Anthidium porterae Cockerell, 1900, Stelis ricardonis Cockerell, 1912] https://doi.org/10.4039/Ent44293-1

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Robertson C (1902) Some new or little-known bees.—IV. The Canadian Entomologist 34(12): 321–325. [Anthidium psoraleae Robertson, 1902] https://doi.org/10.1017/S0008347X0017779X

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McNally AG (1955) Exhibits at the Annual Meeting. Annual Report of the Entomological Society of Ontario 89: 129. [Holcopasites calliopsidis calliopsidis (Linsley, 1943), Anthidium tenuiflorae Cockerell, 1907, Osmia subaustralis Cockerell, 1900]

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Scudder GGE (1992) Threatened and endangered invertebrates of the South Okanagan. Pp 47-57 in Rautio S (ed) Community Action for Endangered Species. Symposium proceedings, Northwest Wildlife Preservation Society and Federation of B.C. Naturalists, Vancouver, B.C. ISBN 0969163320 [Anthidium palliventre Cresson, 1878]

Scudder GGE (1994) An annotated systematic list of the potentially rare and endangered freshwater and terrestrial invertebrates in British Columbia. Occasional Papers of the Entomological Society of British Columbia 2: 1-92. [Anthidium palliventre Cresson, 1878, Stelis maculata (Provancher, 1888), Stelis ricardonis Cockerell, 1912]

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Mickel CE (1928) The biotic factors in the environmental resistance of Anthophora occidentalis Cress. (Hym.: Apidae: Dip., Coleop.). Entomological News 39(3): 69-78. [Osmia texana Cresson, 1872]

Sandhouse GA (1939) The North American bees of the genus Osmia (Hymenoptera: Apoidea). Memoirs of the Entomological Society of Washington 1: 1-167. [Hoplitis fulgida (Cresson, 1864), Hoplitis hypocrita (Cockerell, 1906), Hoplitis louisae (Cockerell, 1934), Osmia atriventris Cresson, 1864, Osmia atrocyanea atrocyanea Cockerell, 1897, Osmia bella Cresson, 1878, Osmia bruneri Cockerell, 1897, Osmia californica Cresson, 1864, Osmia conjuncta Cresson, 1864, Osmia cyaneonitens Cockerell, 1906, Osmia georgica Cresson, 1878, Osmia marginipennis Cresson, 1878, Osmia montana montana Cresson, 1864, Osmia subaustralis Cockerell, 1900, Osmia texana Cresson, 1872, Osmia dakotensis Michener, 1937, Osmia subfasciata Cresson, 1872]

Rust RW (1974) The systematics and biology of the genus Osmia, subgenera Osmia, Chalcosmia, and Cephalosmia (Hymenoptera: Megachilidae). The Wasmann Journal of Biology 32(1): 1-93. [Osmia californica Cresson, 1864, Osmia marginipennis Cresson, 1878, Osmia montana montana Cresson, 1864, Osmia subaustralis Cockerell, 1900, Osmia texana Cresson, 1872]

Michener CD (1936) New Californian Osmiinae (Hymen., Megachilidae). Bulletin of the Southern California Academy of Sciences 35: 84-93. [Ashmeadiella cubiceps (Cresson, 1879), Osmia subfasciata Cresson, 1872]

Michener CD (1939) A revision of the genus Ashmeadiella (Hymen., Megachilidae). The American Midland Naturalist 22(1): 1-84. [Ashmeadiella cubiceps (Cresson, 1879)]

Hartman CG (1944) Notes on the habits of Osmia georgica Cresson as ascertained by the glass-tube method. Psyche 51(3-4): 162-165. [Osmia georgica Cresson, 1878]

Hawkins WA (1975) Nesting biology of Osmia (Chalcosmia) georgica (Hymenoptera: Megachilidae), Journal of the Kansas Entomological Society 48(4): 493-499. [Megachile mendica Cresson, 1878, Osmia georgica Cresson, 1878] http://www.jstor.org/stable/25078469

Graenicher S (1928) New bees from the Miami region of Florida (Hymen.; Andrenidae, Megachilidae). Entomological News 39: 279-284. [Heriades leavitti Crawford, 1913]

Robertson C (1929) Flowers and Insects. Lists of Visitors of Four Hundred and Fifty-three Flowers. The Science Press Printing Company, Lancaster, PA. 221 pp. [Hylaeus nelumbonis (Robertson, 1890), Halictus farinosus, Smith, 1853, Heriades leavitti Crawford, 1913]

Robertson C (1930) Proterandry and flight of bees (Hymen.: Apoidea). Second Paper. Entomological News 41(5): 154-157. [Heriades leavitti Crawford, 1913]

Robertson C (1905) Some new or little–known bees.—V. The Canadian Entomologist 37(7): 236-237. https://doi.org/10.4039/Ent37236-7 [Heriades carinata Cresson, 1864, Heriades variolosus variolosus (Cresson, 1872)] https://doi.org/10.4039/Ent37236-7

Onuferko TM, Buck M, Gibbs J, Sokoloff PC (2023) Asymmetric responses by bees and aculeate wasps to dune stabilisation across the southern Canadian prairies Insect Diversity and Conservation 16: [Perdita albipennis canadensis Crawford, 1912, Perdita bruneri Cockerell, 1897, Perdita pretiosa Timberlake, 1980, Perdita swenki Crawford, 1915, Colletes brevicornis Robertson, 1897, Colletes wilmattae Cockerell, 1904, Hoplitis producta producta (Cresson, 1864), Megachile brevis Say, 1837, Megachile dentitarsus Sladen, 1919, Megachile melanophaea Smith, 1853, Megachile perihirta Cockerell, 1898, Osmia atriventris Cresson, 1864, Osmia cyaneonitens Cockerell, 1906, Perdita tridentata Stevens, 1919, Perdita laticincta Swenk and Cockerell, 1907, Calliopsis australior Cockerell, 1897, Osmia dakotensis Michener, 1937, Megachile dakotensis Mitchell, 1926] https://doi.org/10.1111/icad.12659

Cockerell TDA (1899) Some synonymy. Psyche 8(273): 311-312. [Stelis rubi Cockerell, 1898]

Cockerell TDA (1898) Synopsis of the North American bees of the genus Stelis. The Entomologist 31: 166-168. [Stelis rubi Cockerell, 1898]

Sladen FWL (1916) Canadian species of the bee genus Stelis Panz. The Canadian Entomologist 48(9): 312-314. [Stelis monticola Cresson, 1864, Stelis rubi Cockerell, 1898] https://doi.org/10.4039/Ent48312-9

Clement SL, Rust RW (1976) The nesting biology of three species of Hoplitis Klug (Hymenoptera: Megachilidae). The Pan-Pacific Entomologist 52(2): 110-119. [Hoplitis fulgida (Cresson, 1864), Hoplitis hypocrita (Cockerell, 1906), Hoplitis sambuci Titus, 1904, Stelis monticola Cresson, 1864]

Fredenburg A, Gibbs J, Henne DC (2021) A survey of wild bees (Hymenoptera: Anthophila) in Thunder Bay, Ontario, and their floral associations. Journal of the Kansas Entomological Society 93(3): 211-229. https://doi.org/10.2317/0022-8567-93.3.211

Fredenburg A (2020) Diversity, phenology, and host associations of wild bees (Hymenoptera: Anthophila) in Thunder Bay, Ontario. MSc Thesis, Lakehead University, Thunder Bay, Ontario. ix + 74 pp. https://knowledgecommons.lakeheadu.ca/handle/2453/4700

Cockerell TDA (1912) Names applied to bees of the genus Nomada, found in North America. Proceedings of the United States National Museum 41(1852): 225-243. [Nomada vegana Cockerell, 1903]

Cockerell TDA (1905) The bees of the genus Nomada found in Colorado, with a table to separate all the species of the Rocky Mountains. Bulletin of the Agricultural Experimental Station of the Colorado Agricultural College 94: 69-85. [Nomada alpha Cockerell, 1905, Nomada crawfordi Cockerell, 1905, Nomada vegana Cockerell, 1903]

Bethune CJS (1877) Insects of the northern parts of British America. The Canadian Entomologist 9(1): 148-156.

Evans JD (1896) List of Hymenoptera taken at Sudbury, Ont. The Canadian Entomologist 28(1): 9-13. [Colletes americanus Cresson, 1868, Augochlora pura pura (Say, 1837)] https://doi.org/10.4039/Ent289-1

Michener CD (1951) Subfamily Colletinae. In: Muesebeck CF, Krombein KV, Townes HK (Eds) Hymenoptera of America north of Mexico Synoptic Catalog. 2. United States Department of Agriculture Agricultural Monograph, Washington. Pp. 1043-1049. [Colletes americanus Cresson, 1868, Colletes brevicornis Robertson, 1897, Colletes consors mesocopus Swenk, 1907, Colletes eulophi Robertson, 1891 , Colletes fulgidus fulgidus Swenk, 1904, Colletes willistoni Robertson, 1891]

Linsley EG (1951) Subfamily Hylaeinae. In: Hymenoptera of America north of Mexico Synoptic Catalog. Edited by CFW Muesebeck, KV Krombein, and HK Townes. USDA Agricultural Monograph No. 2, Washington, D.C. pp 1049-1052.

Michener CD (1951) Family Halictidae. In: Muesebeck CF, Krombein KV, Townes HK (Eds) Hymenoptera of America north of Mexico Synoptic Catalog. 2. United States Department of Agriculture Agricultural Monograph, Washington. Pp. 1104-1134. [Agapostemon texanus Cresson, 1872, Augochlora pura pura (Say, 1837), Halictus confusus confusus Smith, 1853, Halictus farinosus, Smith, 1853, Halictus ligatus Say, 1837, Halictus virgatellus Cockerell, 1901, Lasioglossum bruneri (Crawford, 1902), Lasioglossum cooleyi (Crawford, 1906), Lasioglossum diatretum (Vachal, 1904), Lasioglossum inconditum (Cockerell, 1916), Lasioglossum testaceum (Robertson, 1897), Lasioglossum argemonis (Cockerell, 1897), Halictus confusus arapahonum Cockerell, 1906, Andrena sayi Robertson, 1891]

Michener CD (1951) Family Melittidae. In: Muesebeck CF, Krombein KV, Townes HK (Eds) Hymenoptera of America north of Mexico Synoptic Catalog. 2. United States Department of Agriculture Agricultural Monograph, Washington. Pp. 1134-1136.

Rodeck HG (1951) Tribe Nomadini. In: Muesebeck CF, Krombein KV, Townes HK (Eds) Hymenoptera of America north of Mexico Synoptic Catalog. 2. United States Department of Agriculture Agricultural Monograph, Washington. Pp. 1189-1207. [Nomada alpha Cockerell, 1905, Nomada vegana Cockerell, 1903, Nomada suavis Cresson, 1878]

Linsley EG (1951) Tribe Holcopasitini Linsley, new name. In: Muesebeck CF, Krombein KV, Townes HK (Eds) Hymenoptera of America north of Mexico Synoptic Catalog. 2. United States Department of Agriculture Agricultural Monograph, Washington. Pp. 1207-1208.

Linsley EG (1951) Tribe Biastini. In: Muesebeck CF, Krombein KV, Townes HK (Eds) Hymenoptera of America north of Mexico Synoptic Catalog. 2. United States Department of Agriculture Agricultural Monograph, Washington. Pp. 1208-1209.

Linsley EG (1951) Tribe Neolarrini. In: Muesebeck CF, Krombein KV, Townes HK (Eds) Hymenoptera of America north of Mexico Synoptic Catalog. 2. United States Department of Agriculture Agricultural Monograph, Washington. Pp. 1209-1210.

Linsley EG (1951) Tribe Epeolini. In: Muesebeck CF, Krombein KV, Townes HK (Eds) Hymenoptera of America north of Mexico Synoptic Catalog. 2. United States Department of Agriculture Agricultural Monograph, Washington. Pp. 1211-1218.

Linsley EG (1951) Tribe Epeoloidini. In: Muesebeck CF, Krombein KV, Townes HK (Eds) Hymenoptera of America north of Mexico Synoptic Catalog. 2. United States Department of Agriculture Agricultural Monograph, Washington. Pp. 1218. [Epeoloides pilosulus (Cresson, 1878)]

Michener CD (1951) Tribe Anthophorini. In: Muesebeck CF, Krombein KV, Townes HK (Eds) Hymenoptera of America north of Mexico Synoptic Catalog. 2. United States Department of Agriculture Agricultural Monograph, Washington. Pp. 1233-1240.

Linsley EG (1951) Tribe Melectini. In: Muesebeck CF, Krombein KV, Townes HK (Eds) Hymenoptera of America north of Mexico Synoptic Catalog. 2. United States Department of Agriculture Agricultural Monograph, Washington. Pp. 1242-1243. [Brachymelecta interrupta (Cresson, 1872)]

Michener CD (1951) Subfamily Xylocopinae. In: Muesebeck CF, Krombein KV, Townes HK (Eds) Hymenoptera of America north of Mexico Synoptic Catalog. 2. United States Department of Agriculture Agricultural Monograph, Washington. Pp. 1244-1246.

Burks BD (1951) Tribe Bombini. In: Muesebeck CF, Krombein KV, Townes HK (Eds) Hymenoptera of America north of Mexico Synoptic Catalog. 2. United States Department of Agriculture Agricultural Monograph, Washington. Pp. 1247-1255. [Bombus huntii Greene, 1860, Bombus sandersoni Franklin, 1913]

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Harrington WH (1903) Entomological record, 1902. Hymenoptera. Annual Report of the Entomological Society of Ontario 33: 99-100.

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Pengelly DH (1954) Alfalfa pollination in southern Ontario. Annual Report of the Entomological Society of Ontario 84: 101-118. [Bombus auricomus (Robertson, 1903), Augochlora pura pura (Say, 1837), Augochlorella aurata (Smith, 1853), Megachile brevis Say, 1837, Megachile texana Cresson, 1878]

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