Extracted from Jonathan Koch, James Strange,Paul Williams.2012. Bumble Bees of the Western United States. A product of the U.S. Forest Service and the Pollinator Partnership
with funding from the National Fish and Wildlife Foundation
Distribution: Sierra-Cascade Crest east to the Colorado
Rocky Mountains and Black Hills; south into New Mexico and
Arizona; north into Canada
Can be confused with B. bifarius, B. sylvicola, B. melanopygus,
and B. rufocinctus
Thorax anterior to distinct black band between wing
bases yellow, scutellum, T1 and T4 yellow, T2-3
orange, T5 black.
Mid leg basitarsus with the distal posterior corner
rounded. Cheek length as long as broad. Hair of the
face and top of head completely yellow. On the side of
the thorax, the lower anterior surface with yellow hair,
corbicular fringes black. Hair length medium and even.
Extracted from Bumble Bees and Cuckoo Bumble Bees of California by Thorp, R. (1983).
Discussion. B. huntii belongs to the group of species which includes B. btfarius and vosnesenskii, and can be separated from both by the bright red hair covering its metasomal tergites 2 and 3, and the completely yellow hair of the scutellum. This species is extremely uniform in color pat-tern, with only occasional specimens having the red metasomal hairs fading to yellowish.
Nests of this species are discussed by Medler (1959) and Hobbs (1967b).
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