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Colletes aestivalis Patton, 1879


Scientific Name: Colletes aestivalis Patton, 1879

Common Name: Colletes aestivalis


Colletes aestivalis Patton, 1879: 142 [♀].

     Neotype ♀, designated by Stephen (1954: 283). USA, Maryland, Cabin John, 1 June 1918, by R.M. Fouts [USNM no. 534546].

Colletes heucherae Robertson, 1891: 61 [♀, ♂]. Synonymy by Robertson (1895: 116).

     Lectotype ♀, designated by Stephen (1954: 283)]. USA, Illinois, Carlinville, by C. Robertson [INHS no. 3996].


Taxonomic notes: Records of this species from Manitoba likely represent C. andrewsi Cockerell, 1906 (see Stephen 1954: 283), as was the case for material identified as C. aestivalis Patton, 1879 by Graenicher (1935: 302) (see Stephen 1954: 281).

DNA Barcode Index Number (BIN): N/A

BiologyColletes aestivalis is an oligolege of Heuchera (Fogel et al. 2023).

Distribution in Canada: Criddle et al. 1924 [MB]; Michener 1951 [MB]; Romankova 2003 [ON].

Stephen (1954: 283) indicated that this species likely did not range further west than southern Illinois, and though he did not record it from eastern Canada, the records of Romankova (2003: 99) are plausable. As discussed above, records of this species from Manitoba likely represent C. andrewsi, so are not included.

Body length: ♀ 12 mm ♂ 12 mm

Forewing length: ♀ 7.5 mm ♂ 7.5 mm


Michener CD (1951) Superfamily Apoidea. 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, 1420 pp.

Patton WH (1879) Synopsis of the New England species of Colletes. Proceedings of the Boston Society of Natural History 20: 142-144.

Robertson C (1891) Descriptions of new species of North American bees. Transactions of the American Entomological Society 18(1): 49-66.

Robertson C (1895) Notes on bees, with descriptions of new species. Transactions of the American Entomological Society 22(2): 115-128.

Romankova T (2003) Bees of the genus Colletes of Ontario (Hymenoptera, Apoidea, Colletidae). Journal of the Entomological Society of Ontario 134: 91-106.

Stephen WP (1954) A revision of the bee genus Colletes in America north of Mexico (Hymenoptera Colletidae). University of Kansas Science Bulletin 36: 149-527.

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

Fogel NS, Kirmaier C, Arduser M (2023) First known records of the specialist bee, Colletes aestivalis (Hymenoptera: Colletidae), in an urban area. The Great Lakes Entomologist 56(2): 231-234.

Sociality: Solitary
Nesting: Ground
Wintering Stage: Adult

Crop Preference: Not Available
Non Crop Preference: Heuchera americana, Heuchera sp.

Distribution: Ontario
Ecozone: Mixwood Plains

Distribution Map