Bombus crotchii

On B. californicus there is a yellow band is on the 4th abdominal segment, whereas B. crotchii females have a larger yellow band on the 2nd abdominal segment and a sometimes-visible patch of orange near the end of the abdomen. Thanks to Kristal Watrous, Woodard Lab Entomology Dept., UC Riverside

Hymenoptera: Apidae

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Riley Wilderness Park, Coto de Caza, Orange County, CA. 8-7-06. © Ron Hemberger