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Epeoloides pilosulus (Cresson, 1878)


Scientific Name: Epeoloides pilosulus (Cresson, 1878)

Common Name: Macropis Cuckoo Bee


Nomada pilosula Cresson, 1878a: 77 [♂].

     Holotype ♂‚. USA, New York [ANSP no. 2601].

Nomia compacta Provancher, 1888: 337 [♂]. Synonymy by Mitchell (1962: 491).

     Type ♂. CANADA, Quebec, Cap Rouge [ULQC no. 1670; lost].

Epeolus pilosulus Provancher, 1888: 426 [♂, not  ♀ as indicated]. Synonymy by Mitchell (1962: 491). 

     Lectotype ♂ [designated by Sheffield and Perron (2014: 146)]. CANADA, Quebec, Cap Rouge [ULQC no. 1529].

Viereckella obscura Swenk, 1907: 299 [♀] [synonymy by C.D. Michener, in Sheffield et al. (2004: 162)].

     Holotype ♀. USA, Nebraska, Sarpy County, Meadow, 14 July 1905, by P.R. Jones [UNSM].

Viereckella ceanothina Cockerell, in Swenk 1907: 300 [♀]. Synonymy of V. pilosula Cresson by Swenk (1912: 113, as he still felt his V. obscura was a distinct species).

     Holotype ♀. USA, Virginia, Falls Church, 14 June [no year provided], by N. Banks, on Ceanothus [UNSM?]

Epeoloides nearcticus Ducke, 1909: 39 [♀]. Synonymy by Bequaert (1920: 12).

     Holotype ♀. USA, Pennsylvania, Sunbury, by Baker [Baker Collection?].


Taxonomic Notes: Though Swenk (1912: 113) synonymized V. ceanothina Cockerell under E. pilosulus (Cresson), he, and later Crawford (1917: 167) felt that E. obscura Swenk was a valid species, and it was recognized as such (e.g., Linsley and Michener 1939: 295; Linsley 1951d: 1218; Hurd 1979: 2087) until 2004 when it was synonymized under E. pilosulus by C.D. Michener (in Sheffield et al. 2004: 162), though he suspected this earlier (Michener 2000: 655).

Distribution in Canada: Provancher 1888 [QC, as Nomia compacta Provancher]; Cockerell 1898 [Canada, as Nomia compacta Provancher; treatment of Nomia]; Criddle et al. 1924 [MB, QC]; Sheffield et al. 2004 [NS], 2014 [SK, MB]; Sheffield and Heron 2018 [AB, SK, MB, ON, QC, NS]; Gibbs et al. 2021 [MB], 2023 [MB]

Though earlier records for Canada existed (see above), Linsley (1951: 1218) did not record this species from Canada. This is a single observation of this species from New Brunswick on iNaturalist (



Bequaert J (1920) Hymenoptera collected near Boston, Mass., with description of a variety of Bombus affinis. Psyche 27: 6-12.

Cresson ET (1878) Descriptions of new North American Hymenoptera in the collection of the American Entomological Society. Transactions of the American Entomological Society 7: 61-136.

Ducke A (1908) Contributions à la connaissance des Hymémoptères des deux Amériques. Revue d\\\'entomologie 27: 28-55.

Mitchell TB (1962) Bees of the Eastern United States. Volume 2. North Carolina Agricultural Experimental Station Technical Bulletin 152: 1-557.

Provancher L (1888) In 1885-1889. Additions et Corrections au Volume II de la Faune Entomologique du Canada Traitant des Hyménoptères, pp. 1-475. Quebec: Darveau.

Swenk MN (1907) The bees of Nebraska.—III. Entomological News 18: 293-300.


Linsley EG (1951) Tribe Epeoloidini. 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.

Sociality: Parasitic
Nesting: Ground
Pollen Specialization: Not Applicable
Wintering Stage: Mature Larva

Crop Preference: Not Available
Non Crop Preference: Ceanothus sp., Rudbeckia hirta, Symphyotrichum falcatum var. commutatum, Eurybia macrophylla, Apocynum androsaemifolium

Distribution: Alberta, Manitoba, Nova Scotia, Ontario, Quebec, Saskatchewan
Ecozone: Atlantic Maritime, Boreal Plains, Boreal Shield, Mixwood Plains, Prairie

female; lateral view
female; lateral view

Distribution Map