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Bombus vandykei (Frison, 1927) Bremus flavifrons var vandykei Frison, 1927; Pyrobombus (Pyrobombus) cascadensis Milliron, 1970
Life
Insecta
Hymenoptera
Apoidea
Apidae
Bombus
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Williams, Paul H., Robbin W. Thorp, Leif L. Richardson, and Sheila R. Colla. Bumble Bees of North America: An Identification Guide. Princeton University Press, 2014. http://www.jstor.org/stable/j.ctt6wpzr9.
Known as the Van Dyke Bumble Bee.
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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
Status: Uncommon Select food plant genera: Phacelia, Collinsia, Clarkia, Streptanthus, Penstemon, Stachys Tongue Length: Medium Distribution: Pacific States from Washington to southern California Can be confused with B. vosnesenskii, B. caliginosus, and B. californicus Females (queens and workers, colors refer to hair). Thorax anterior to distinct black band between wing bases yellow, scutellum and T1-2 usually black, T3 yellow at least apically, T4-6 black. Mid leg basitarsus with the distal posterior corner rounded. Cheek length longer than broad. Hair of the face and top of head completely yellow. On the side of the thorax, the lower anterior surface with black hair, corbicular fringes black. S2-5* with yellow hair apically. Hair length medium and uneven.
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