Bombus impatiens or griseocollis? - Bombus griseocollis
Washington Crossing, Bucks County, Pennsylvania, USA July 16, 2018
To my eye, characters favoring griseocollis are: Black vertex, belt of yellow-brown hairs around base of T2, hairs on thorax dense. Characters favoring impatiens are: wings not black, position of ocelli high -- at top of eyes. Comments from experts welcome.