Either B. auricomis or B. pensylvanicus - wings appear light.
Worker, predated by Agelenopsis sp.
Discovered these little guys when I disturbed them raking up an overgrown area in the yard and was stung by one. They weren't at all aggressive when I approached the nest 10 min later, but I'm a little nervous to get any closer for a better pic!
Either B. auricomis or B. pensylvanicus - wings appear light.