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Perdita swenki Crawford, 1915


Scientific Name: Perdita swenki Crawford, 1915

Common Name: Swenk\\\\\\\'s Fairy Bee


Perdita bruneri Cockerell, 1897: 23 [♀, not ♂].

Perdita swenki Crawford, 1915: 109 [♂, ♀].

     Syntype ♂, ♀. USA, Nebraska, Westpoint, 11 September 1901, by J.C Crawford, on Solidago rigida [USNM no. 19964].


Taxonomic notes: This species was described from three pairs taken in copula, but Crawford (1915: 103) designated a type pair with the information above. Crawford (1915: 103) indicated that others had previously misidentied this species as P. bruneri Cockerell, 1897, and indicated that the female described by Cockerell was in fact this species, not P. bruneri. Cockerell (1922: 9) later confirmed Crawford’s synonymy.

Timberlake (1929: 115) described an atypically marked female specimen from Illinois with lunate yellow markings on the “dog-ear plates” (subantennal area of Michener 2007), though later indicated that subantennal markings were more common on specimens from northern parts of the range (Timberlake 1960: 104); most specimens examined from Saskatchewan have these markings, though they are absent on the single specimen from British Columbia.

DNA Barcode Index Number (BIN): BOLD:AAC6693

Distribution in Canada: Criddle et al. 1924 [AB]; Mitchell 1960 [AB]; Sheffield et al. 2014 [AB, SK, MB]; Gibbs et al. 2023 [MB]; Onuferko et al. 2023 [AB, SK, MB]. (22 September 2023) GBIF Occurrence Download


Crawford JC (1915) New North American Hymenoptera. Insecutor Inscitiae Menstruus 3: 107-109.

Mitchell TB (1960) Bees of the Eastern United States. Volume 1. North Carolina Agricultural Experiment Station Technical Bulletin 141: 1-538.

Sheffield CS, Frier SD, Dumesh D (2014) The bees (Hymenoptera: Apoidea, Apiformes) of the Prairies Ecozone, with comparisons to other grasslands of Canada. In: Giberson DJ, Cárcamo HA (Eds) Arthropods of Canadian Grasslands (Volume 4): Biodiversity and Systematics Part 2. 4. Biological Survey of Canada, Ottawa, 479 pp. [ISBN 978-0-9689321-7-9].

Gibbs J, Hanuschuk E, Miller R, Dubois M, Martini M, Robinson S, Nakagawa P, Sheffield CS, Onuferko T (2023) A checklist of the bees (Hymenoptera: Apoidea) of Manitoba, Canada. The Canadian Entomologist 155: E3.

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

Cockerell TDA (1922) Bees of the genus Perdita from the western United States. American Museum Novitates 33: 1-14.

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:

Timberlake PH (1960) A revisional study of the bees of the genus Perdita F. Smith, with special reference to the fauna of the Pacific coast (Hymenoptera, Apoidea) Part IV. University of California Publications in Entomology 17(1): 1-156.

Timberlake PH (1929) New records and descriptions of bees of the genus Perdita (Hymenoptera). Journal of the New York Entomological Society 37(2): 111-125.

Cockerell TDA (1897) Some species of Perdita from Nebraska. Entomological News 8: 23-24.

Sociality: Solitary
Nesting: Ground
Pollen Specialization: Broad Oligolecty
Wintering Stage: Mature Larva

Crop Preference: Not Available
Non Crop Preference: Not Available

Distribution: Alberta, Manitoba, Saskatchewan
Ecozone: Mixwood Plains, Prairie

Distribution Map