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Nomada crotchii Cresson, 1878


Scientific Name: Nomada crotchii Cresson, 1878

Common Name: Crotch s Nomad Bee


Nomada Crotchii Cresson, 1878: 81 [♀].

     Holotype . USA, California, Fort Tejon, by Crotch [ANSP no. 2611].

Nomada (Xanthidium) crotchii var. nigrior Cockerell, 1903: 564 [♀].

     Syntypes ♀. USA, California, “So. Cal.” [ANSP no. 10412].


Taxonomic Notes: The ♂ of N. crotchii nigrior Cockerell was briefly described by Cockerell (1916: 54). Cockerell (1916: 57) indicated that the male of the typical form was unknown under his discussion of the male of N. erythrospila Cockerell (described on the previous page), though felt the taxa had to be different.

Cockerell (1903: 564) distinguished his N. crotchii nigrior Cockerell based on the the dark markings of the metasoma being black, not largely ferruginous as in the typical form (Cresson 1878: 82). The male also has no red markings on the thorax.

DNA Barcode Index Number (BIN): BOLD:AAF3711

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


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.

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

Cockerell TDA (1903) Bees of the genus Nomada from California. Proceedings of the Academy of Natural Sciences of Philadelphia 55: 559-579.

Sociality: Parasitic
Nesting: Ground
Pollen Specialization: Not Applicable

Crop Preference: Not Available
Non Crop Preference: Not Available

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

Distribution Map