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Megachile perihirta Cockerell, 1898


Scientific Name: Megachile perihirta Cockerell, 1898

Common Name: Western Leafcutter Bee


Megachile perihirta Cockerell, 1898: 126 [♂].

     Holotype ♂. USA, Colorado, Colorado Springs, mid July [no year provided], by T.D.A. Cockerell [no. 3571] [USNM no. 9658].

Megachile latimanus grindeliarum Cockerell, 1904: 33 [♀]. Synonymy by Sladen (1918: 85).

     Holotype ♀. USA, Colorado, Colorado Springs, 10 September [no year provided], by T.D.A. Cockerell, on Grindelia squarrosa [].

Megachile grindelearum Criddle, 1926: 106. Lapsus of Megachile latimanus grindeliarum Cockerell, 1904.


Taxonomic notes: Mitchell (1936: 136) indicated that the ♀ of Megachile perihirta Cockerell, 1898 was practically indistinguishable from M. latimanus Say, 1823.

DNA Barcode Index Number (BIN): BOLD:ABZ7961

Distribution in Canada: Cockerell 1912 [BC, AB; as M. latimanus Say, though likely M. perihirta Cockerell based on description]; Gibson 1917 [BC, AB], 1918 [BC, AB, ON]; Sladen 1918 [BC, AB, ON]; Criddle 1926 [BC, as M. grindeliarum Cockerell]; Mitchell 1936a [BC, AB], 1962 [BC]; Cockerell 1937iii [AB]; Buckell 1950 [NT, BC]; Sheffield et al. 2011 [NT, BC-SK, ON], 2014 [AB, SK, MB]; Elwell 2012 [BC]; Evans 2013 [AB]; Pindar 2014 [ON-error?]; Sheffield and Heron 2019 [BC]; Vizza et al. 2021 [NU]; Gibbs et al. 2023 [MB]; Onuferko et al. 2023 [SK, MB].


Cockerell TDA (1898) Some bees of the genus Megachile from New Mexico and Colorado. Annals and Magazine of Natural History, Series 7 1(): 125-130.

Cockerell TDA (1904) Two new bees. Entomological News 15: 32-34.

Mitchell TB (1936) A revision of the genus Megachile in the Nearctic region. Part IV. Taxonomy of the subgenera Xanthosarus, Phaenosarus, Megachiloides and Derotropis (Hymenoptera: Megachilidae). Transactions of the American Entomological Society 62(2): 117-166.

Cockerell TDA (1937) The bees of Alberta.—III. The Canadian Entomologist 69(4): 86-89.

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.

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 (1926) The entomological record, 1925. Annual Report of the Entomological Society of Ontario 56: 94-107.

Sladen FWL (1918) Pollination of alfalfa by bees of the genus Megachile. The Agricultural Gazette 5(2): 125-126.

Gibson A (1917) The entomological record, 1916. Annual Report of the Entomological Society of Ontario 47: 137-171.

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

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:

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.

Vizza KM, Beresford DV, Hung KJ, Schaefer JA, MacIvor JS (2021) Wild bees (Hymenoptera: Apoidea) from remote surveys in northern Ontario and Akimishi Island, Nunavut including four new regional records. Journal of the Entomological Society of Ontario 152: 57-80.

Pindar AN (2014) The effect of fire disturbance on bee community composition in Oak Savannah habitat in southern Ontario, Canada. PhD Thesis, York University, Toronto. xiv + 160

Evans MM (2013) Influences of grazing and landscape on bee pollinators and their floral resources in rough fescue prairie. MSc Thesis, University of Calgary. ix + 119 pp.

Sheffield CS, Ratti C, Packer L, Griswold T (2011) Leafcutter and mason bees of the genus Megachile Latreille (Hymenoptera: Megachilidae) in Canada and Alaska. Canadian Journal of Arthropod Identification 18: 1-107.

Sociality: Solitary
Nesting: Ground
Pollen Specialization: Polylectic
Wintering Stage: Mature Larva

Crop Preference: Not Available
Non Crop Preference: Not Available

Distribution: Alberta, British Columbia, Manitoba, Northwest Territories, Nunavut, Ontario, Saskatchewan
Ecozone: Boreal Cordillera, Boreal Plains, Boreal Shield, Montane Cordillera, Pacific Maritime, Prairie, Taiga Plains, Western Interior Basin

Distribution Map