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Diadasia australis australis (Cresson, 1878)


Scientific Name: Diadasia australis australis (Cresson, 1878)

Common Name: Cactus Chimney Bee


Melissodes australis Cresson, 1878: 214 [♀, ♂].

     Lectotype ♀, designated by Cresson (1916: 112). USA, Colorado [ANSP no. 2356].

Diadesia australis Watson, 1911: 83. Lapsus of Melissodes australis Cresson, 1878.

Diadasia enavata Sheffield, Frier, and Dumesh, 2014: 456. Misidentification.


Taxonomic notes: Cockerell (1939: 60) considered his Diadasia australis petrinus Cockerell, 1923 a form of D. rinconis Cockerell, 1897, though at the time of the original description (i.e., Cockerell 1923: 84) he also considered the latter a subspecies of D. australis (Cresson, 1878) (as he has since Cockerell 1905); Timberlake (1941: 3) followed Cockerell’s (Cockerell 1939) classification. Adlakha (1969: 145) did not examine D. australis petrinus but indicated that Michener (1951: 1220) also considered it a subspecific taxon of D. rinconis, but it is not formally included in that work (i.e., Michener 1951) or subsequent versions of the catalogue (i.e., Hurd 1979) as it is known from Mexico (Lower California). Both D. australis petrinus and D. australis californica Timberlake are currently considered valid subspecies of D. australis (Ascher and Pickerling 2023), which is tentatively followed here; only the typical form occurs in Canada.

DNA Barcode Index Number (BIN): BOLD:AAC3232.

Distribution in Canada: Gibson 1919 [AB]; Sheffield et al. 2014 [AB, MB, SK, as D. enavata (Cresson)]; Sheffield and Heron 2019 [BC]; Gibbs et al. 2023 [MB].


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, 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.

Cresson ET (1878) Descriptions of new species of North American bees. Proceedings of the Academy of Natural Sciences of Philadelphia 30: 181-221.

Cockerell TDA (1939) Bees related to Diadasia australis Cresson. The Pan-Pacific Entomologist 15(2): 59-60.

Cockerell TDA (1923) Expedition of the California Academy of Sciences to the Gulf of California in 1921. The bees (I). Proceedings of the California Academy of Scientes 12(7): 73-103.

Michener CD (1951) Tribe Emphorini. 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. 1218-1221.

Adlakha RL (1969) A systematic revision of the bee genus Diadasia Patton in America north of Mexico. Ph.D. thesis, University of California, Davis. 187 pp.

Gibson A (1919) The entomological record, 1918. Annual Report of the Entomological Society of Ontario 49: 97-123.

Cockerell TDA (1905) Diadasia Patton; a genus of bees. The American Naturalist 39(466): 741-745.

Watson JR (1911) A contribution to the study of the ecological distribution of animal life of north central New Mexico with especial attention to the insects. The Natural Resources Survey of The Conservation and Natural Resources Commission of New Mexico 1: 67-117.

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

Crop Preference: Not Available
Non Crop Preference: Not Available

Distribution: Alberta, British Columbia, Manitoba, Saskatchewan
Ecozone: Montane Cordillera, Prairie, Western Interior Basin

Distribution Map