Other Common Names
Often cited as Brownbelted Bumble Bee, but use of a hyphen is generally preferred when citing common names (see AOU and BOU bird checklists).
Synonyms and other taxonomic changes
Bombus griseocollis (DeGeer)
Orig. Comb: Apis griseocollis DeGeer 1773
Syns: Bombus separatus and Bombus mormonorum.
Explanation of Names
The common name refers to the brown belt on T2.
queen: body length 21-23 mm. Notably large.
male: 15-19 mm
worker: 9.5-18 mm
Diagnostic characters include black wings, black head, low position of ocelli, short dense hairs on thorax, and belt of contrasting brown hairs at base of T2. Males have large eyes. See detailed description of queen and male at discoverlife.org
Tongue length: medium
Broad, including urban parks.
mostly: Apr-Sept (BG data)
Partial to coneflowers (Echinacea) and other composites. The Hosts section of its Discover Life species page
lists known associations based on specimen records and images.
Emerges rather early in spring. Ceases activity much earlier in the fall than does B. impatiens.
After B. impatiens often the second most commonly encountered bumble bee at many sites in the eastern United States. However, it becomes relatively scarce northwards, as at Ithaca.
Common name reference; PDF doc
(Committee on Common Names of Insects, Entomological Society of America)
. Live and pinned adult images