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Photo#361243
B. bimaculatus and impatiens - Bombus - female

B. bimaculatus and impatiens - Bombus - Female
Perry County, Pennsylvania, USA
A comparison of the two. The coloration is almost identical accept for bimaculatus has yellow on T2 and more black on the top of the thorax

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B. bimaculatus and impatiens - Bombus - female B. bimaculatus and impatiens - Bombus - female

Moved

Moved
Moved from Bumble Bees.

also the queen of bimaculatus averages smaller
and has longer shaggier hair with bare spot in middle of thorax vs. "crew cut" and uniform in impatiens.

Black hairs on impatiens thorax are diffuse and therefore inconspicuous vs. focused in a central spot in bimaculatus

Note that many impatiens have some yellow hairs on T2, so it is important to note exact shape of yellow patch on T2 medially in bimaculatus

tone of yellow in impatiens is usually more grayish-tan vs. lemony in bimaculatus but this is very subtle and the average difference doesn't apply to worn or unusually fresh specimens

A shot of the head would be useful to show differences in vertex hair patterns (more yellow in bimaculatus) and malar space (longer in bimaculatus).

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