Pullman, Whitman County, Washington, USA August 20, 2014 Size: 1.5 to 2 cm body length
The photo was taken around 5:30 pm on a warm and sunny day. The bumble bee was feeding in a winter hibiscus blossom and was very sluggish. I suspect it may be a female B. morrisoni, however the 1st abdominal segment is somewhat orange. What may it be?