Synonyms and other taxonomic changes
Bombus fraternus (Smith)
Orig. Comb: Apathus fraternus Smith 1854
Syn: Bombus scutellaris
queen: body length 21-27 mm
male: 19-25 mm
worker: 13-18 mm
Black interalar band broad and well defined. T3 black (as opposed to yellow in auricomus and sonorus). T2 entirely yellow-tan (lacking the black apicolateral corners typical of griseocollis).
see detailed description of queen and male at discoverlife.org
Historic records come from e US to NM (MI;IL;IN;OH;KY;NJ;MD;DE;VA;DC;TN;NC;SC;MS;AL;GA;FL;IA;MO;AR;LA;SD;NE;KS;OK;TX;CO;NM) and Mexico: Chihuahua.
Typically prairies and similar open sites
The Hosts section of its Discover Life species page
lists known associations based on specimen records and images.
Has disappeared from the northern margins of its range, with few or no records from the northernmost states where recorded historically, but still regularly encountered in its core range on the southern Great Plains, and still found in the Southeastern United States.
24 pinned adult images
plus detailed description of queen and male, distribution, seasonality, flower records (discoverlife.org)
common name reference; PDF doc
(Committee on Common Names of Insects, Entomological Society of America)