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Andrena angustitarsata Viereck, 1904


Scientific Name: Andrena angustitarsata Viereck, 1904

Common Name: Narrow-legged Miner Bee


Andrena angustitarsata Viereck, 1904, in Viereck et al., 1904: 189, 196 [♀].

     Holotype ♀. USA, Washington [Washington Territory] [ANSP no. 10283].

Andrena mustelicolor Viereck, 1904, in Viereck et al. 1904: 189, 195, 196 [♀, ♂]. Synonymy by LaBerge (1989: 18).

     Holotype ♀. USA, Washington, Pullman, by C.V. Piper [UNSM].

Pterandrena nudiscopa Viereck, 1904, in Viereck et al. 1904: 228 [♀]. Synonymy by Cockerell (1936: 145).

     Lectotype ♀, designated by Cresson (1928: 62). USA, Oregon, Corvallis, 2 April 1899, by Cordley [ANSP no. 4099].

Andrena opaciventris Cockerell, 1916: 47 [♀]. Preoccupied, not Andrena opacivenrtis Friese, 1921. Synonymy by LaBerge (1989: 18).

     Holotype ♀. USA, California, Claremont, by Baker [CAS no. 15361].

Andrena (Andrena) friesei Viereck, 1917: 558 [♀]. Synonymy by LaBerge (1989: 18).

     Holotype ♀. USA, California, southern California, by H.K. Morrison [ANSP no. 4035].

Andrena (Andrena) angustitarsata race huardi Viereck, 1917: 368 [♀]. Tentative synonymy.

     Holotype ♀. USA, California [ANSP no. 4051].

Andrena opacissima Cockerell, 1918: 165 [♀]. Synonymy by LaBerge (1989: 18).

     Holotype ♀. USA, Idaho, Nampa, Indian Creek, 26 April 1916, by G. McGlothlen, on willow [CAS no. 15360].

Andrena (Platandrena) opacibasis Cockerell, 1936: 146 [♀]. Synonymy by LaBerge (1989: 19).

     Holotype ♀. USA, California, [Modoc County near Eagleville], near Lower Lake, April 1935, by T.D.A. Cockerell, on yellow umbellifer [CAS no. 4265].


Taxonomic notes: Viereck (1917: 368) described Andrena (Andrena) angustitarsata race huardi Viereck, 1917 as an ochreous form of Andrena angustitarsata Viereck, 1904, but in that same year it was recorded as a valid species, Andrena huardi Viereck, 1917, by Bray (1917: 99). Linsley (1951: 1068), Hurd (1979: 1829), and Gusenleitner and Schwarz (2002: 85) subsequently also considered it valid. Its actual placement remains uncertain, as LaBerge (1989) did not include it as a synonym or a valid species in his revision of the subgenus Simandrena Pérez, 1890. Kathirithamby and Taylor (2005) treated it as a subspecies of A. angustitarsata as a host to strepsipteran parasites, though bee nomenclature in that work is treated rathr poorly. J.S. Ascher (see Ascher and Pickering 2024) lists it as a “possible unpublished synonym” but without indicating the reasoning. However, LaBerge (1989: 22) did indicate that some ♀s have dark ochracous pubescence, as described by Viereck (1917: 368), these individuals not restricted geographically, lending support to the tentative synonymy recorded above (but see comments below).

When Cockerell (1918: 165) described Andrena opacissima Cockerell, 1918, he indicated that it was nearest to Andrena mustelicolor Viereck, 1904 and Andrena nudiscopa (Viereck, 1904), the latter which was subsequently synonymized under Andrena angustitarsata Viereck, 1904 by Cockerell (1936: 145). LaBerge (1989: 18) listed Andrena mustelicolor as a junior synonym of A. angustitarsata, though did not record it as a new synonym. However, it was considered a valid species up until Hurd (1979). Thus, LaBerge (1989) is here credited for the synonymy. LaBerge (1989) also treated Andrena opacissima as a new synonymy of A. angustitarsata, but indicated that they could not locate, thus did not examine, the holotype.

LaBerge (1989: 18) placed A. opaciventris Cockerell into synonymy under A. angustitarsata, but indicated that he was unable to find the type material; he mentioned it should be at Pomona College at Claremont (no. 197) (LaBerge 1898: 22). It was subsequently reported at CAS (Gusenleitner and Schwarz 2002: 85).

LaBerge’s (1989: 22) incorrectly recorded the date of collection for the holotype of P. nudiscopa Viereck as 2 April 1897; this is assumed to be 1899 based on Viereck’s original listing.

DNA Barcode Index Number (BIN): BOLD:AAD9427, BOLD:AAL9743

There are two BINs assigned to this species. Most species have been assigned to BIN BOLD:AAD9427, including those from BC.

One female specimen identified as A. angustitarsata from Washington States has been assigned to BIN BOLD:AAL9743 (a second specimen did not sequence). Barcode Gap Analysis indicates that this sequence differs from A. angustitarsata by 5.27%. In addition, the Washington specimens differ morphologically from typical A. angustitarsata by the shape of the labral process, that of A. angustitarsata being wider at apex than the medial length, while the specimens from Washington have the apex narrower than the medial length; it may correspond to Andrena huardi Viereck, 1917. Preliminary analysis suggests it is sister taxa to A. angustitarsata among the North American Simandrena for which sequences are available.

Distribution in Canada: Criddle et al. 1924 [BC]; LaBerge 1989 [BC]; Elwell 2012 [BC]; Sheffield and Heron 2019 [BC].


Viereck HL, Cockerell TDA, Titus ESG, Crawford JC, Swenk MH (1904) Synopsis of bees of Oregon, Washington, British Columbia and Vancouver.-III. The Canadian Entomologist 36(7): 189-196.

Viereck HL, Cockerell TD, Titus ES, Crawford JC, Swenk MH (1904) Synopsis of bees of Oregon. Washington, British Columbia and Vancouver.-III. The Canadian Entomologist 36(8): 221-232.

Cockerell TDA (1916) New and little known bees from California. Pomona Journal of Entomology and Zoology 8(2): 43-64.

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

Cockerell TDA (1936) Bees from Northern California. The Pan-Pacific Entomologist 12: 133-164.

Hurd PD (1979) Superfamily Apoidea. In: Krombein KV, Hurd Jr PD, Smith DR, Burks BD (Eds) Catalog of Hymenoptera in America North of Mexico. Smithsonian Institution Press, Washington, 2735 pp.

LaBerge WE (1989) A revision of the bees of the genus Andrena of the Western Hemisphere. Part XIII. Subgenera Simandrena and Taeniandrena. Transactions of the American Entomological Society 115(1): 1-56.

Viereck HL (1917[1916]) New species of North American bees of the genus Andrena from west of the 100th meridian contained in the collections of the Academy of Natural Sciences of Philadelphia. Proceedings of the Academy of Natural Sciences of Philadelphia 68: 550-608.

Viereck HL (1917) New species of North American bees of the genus Andrena contained in the collections ofthe Academy of Natural Sciences of Philadelphia. Transactions of the American Entomological Society 43(4): 365-407.

Sheffield CS, Heron JM (2019) The bees of British Columbia (Hymenoptera: Apoidea, Apiformes). Journal of the Entomological Society of British Columbia 115: 44-85.

Criddle N, Curran CH, Viereck HL, Buckell ER (1924) The entomological record, 1923. Annual Report of the Entomological Society of Ontario 54: 87-102.

Cresson ET (1928) The types of Hymenoptera in the Academy of Natural Sciences of Philadelphia other than those of Ezra T. Cresson. Memoirs of the American Entomological Society 5: 1-90.

Linsley EG (1951) Subfamily Andreninae. 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 1052–1086.

Gusenleitner F, Schwarz M (2002) Weltweite Checkliste der Bienengattung Andrena mit Bemerkungen und Ergänzungen zu paläarktischen Arten (Hymenoptera, Apidae, Andreninae, Andrena). Entomofauna, Supplement 10. 1280 pp.

Kathirithamby J, Taylor SJ (2005) A new species of Halictophagus (Insecta: Strepsiptera: Halictophagidae) from Texas, and a checklist of Strepsiptera from the United States and Canada. Zootaxa 1056: 1-18.

Elwell SL (2012) The effects of livestock grazing and habitat type on plant-pollinator communities of British Columbia’s Endangered Shrubsteppe. MSc Thesis, Simon Fraser University. X + 110 pp.

Bray H (1917) List of bees from the Claremont-Laguna region. Pomona College Journal of Entomology and Zoology 9(3): 93-100.

Sociality: Solitary
Nesting: Ground
Pollen Specialization: Polylectic
Wintering Stage: Adult

Crop Preference: Malus pumila, Medicago sativa, Brassica sp.
Non Crop Preference: Ceanothus sp., Baccharis sp., Eriogonum sp., Salix sp., Taraxacum sp., Rhamnus sp., Heracleum sp., Potentilla sp., Vaccinium sp., Fragaria sp., Malus sp., Prunus sp., Pyracantha sp., Rubus sp., Spiraea sp., Amelanchier sp., Trifolium sp., Tamarix sp., Ranunculus sp., Lomatium utriculatum, Lomatium nudicaule, Sanicula crassicaulis, Phacelia sp., Lasthenia sp., Cryptantha sp., Nemophila sp., Eschscholzia californica, Gilia sp., Daucus carota, Arctostaphylos sp., Hackelia floribunda, Salix exigua, Salix nigra, Drymocallis glandulosa, Prunus virginiana var. demissa, Rhus aromatica Aiton var. aromatica, Ribes sp., Taraxacum officinale, Arenaria sp., Heracleum maximum, Acer sp., Ranunculus californicus, Prunus emarginata, Ceanothus velutinus, Lupinus sp., Collinsia verna, Crepis runcinata, Lomatium dissectum, Lomatium triternatum, Acer glabrum, Tetraneuris sp., Lobularia maritima, Amsinckia sp., Coreopsis sp., Cryptantha intermedia, Descurainia sophia, Fraxinus sp., Layia sp., Limnanthes douglasii, Lomatium sp., Lomatium grayi, Myosotis sp., Oenothera sp., Plagiobothrys sp., Quercus sp., Ceratocephala testiculata, Toxicodendron diversilobum, Sanicula sp., Trichostema sp., Wyethia sp.

Distribution: British Columbia
Ecozone: Montane Cordillera, Pacific Maritime, Western Interior Basin

female; lateral view
female; lateral view