Bees of Canada Logo

Osmia atrocyanea atrocyanea Cockerell, 1897


Scientific Name: Osmia atrocyanea atrocyanea Cockerell, 1897

Common Name: Osmia atrocyanea


Osmia atrocyanea Cockerell, 1897: 344 [♀].

     Holotype . USA, Washington, Olympia, 4 July 1896, by T. Kincaid [USNM no. 28209].

Osmia senior Cockerell, 1907: 368 [♀]. Synonymy by Sandhouse (1939: 101).

     Holotype . USA, Colorado, Boulder, 12 June 1905, by W.P. Cockerell [USNM no. 27899].

Osmia pseudamala Cockerell, 1910: 312 [♂]. Synonymy by Sandhouse (1939: 101).

     Holotype . USA, Colorado, Steamboat Springs, 27 May [year not provided], by T.D.A. Cockerell [UCMC; USNM no. 27323].


Taxonomic notes: Sandhouse (1939: 101) also considered Osmia putata Cockerell, 1910 (USNM no. 56092) a synonym of O. atrocyanea Cockerell, though others have considered it a valid subspecies from southern California (Michener 1951: 1167; Hurd 1979: 2047). Sandhouse (1939: 102) remarked on the colour variation in this species, with specimens from Colorado being greenish blue, while those from southern California (i.e., O. a. putata Cockerell) being purplish blue; Cockerell (1910: 272) describing it as “brilliant deep indigo blue”.

Though the holotype ♂ of Osmia pseudamala Cockerell, 1910 is at UCMC, the gentalia apprears to by at the USNM.

DNA Barcode Index Number (BIN): BOLD:AAD0288

Biology: Linsley (1944: 54) recorded Sapyga fulvicornis Cresson as a nest parasite of Osmia atrocyanea Cockerell in California. Presumably it has been reared from trap nests (Linsley 1944).

Distribution in Canada: Buckell 1950 [BC]; Sheffield and Heron 2019 [BC].




Cockerell TDA (1897) New and little-known North American bees. Proceedings of the Academy of Natural Sciences of Philadelphia 49: 334-355.

Cockerell TDA (1907) Descriptions and records of bees.—XIII. Annals and Magazine of Natural History, Series 7 19(113): 361-370.

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.

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

Michener CD (1951) Family Megachilidae. 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. 1136-1186.

Buckell ER (1950) Record of bees from British Columbia: Megachilidae. Proceedings of the Entomological Society of British Columbia 46: 21-31.

Sandhouse GA (1939) The North American bees of the genus Osmia (Hymenoptera: Apoidea). Memoirs of the Entomological Society of Washington 1: 1-167.

Cockerell TDA (1910) New and little-known western bees. Entomological News 21(6): 270-273.

Cockerell TDA (1910) Some insects from Steamboat Springs, Colo.—I. The Canadian Entomologist 42(9): 310 313.

Linsley EG (1944) Host relationships of some sapygid wasps. (Hymenoptera, Sapygidae). Bulletin of the New York Entomological Society 39: 54-55.

Sociality: Solitary
Nesting: Cavity Renter
Wintering Stage: Adult

Crop Preference: Not Available
Non Crop Preference: Not Available

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

Distribution Map