Small Bombus(?) species with very little yellow color, unusual markings on the face. - Anthophora ursina -
Pee Dee NWR, Ansonville, Anson County, North Carolina, USA April 26, 2018 Size: 18- 20mm?
I watched 3 small bumblebees nectaring on Baptisia alba. One of the three had a grayish appearance and had unique markings on the face. I have no clue.