Photographed on the Erie Trail east of North Judson, Indiana, a former rail line now used as a hike and bike trail. It's a sand area, with an oak woodland just to the north. Most of the Tephrosia virginiana was finished blooming, but the few remaining blossoms were being used actively by bees like this one. To me it looks like a Megachile, perhaps Osmia or something similar. I have other photos but can't vouch that any two are the same individual, several similar bees were present. I didn't see these bees visiting any other flowers in the area, the T. virginiana is almost done blooming, and many of these bees had tattered wings, so I wondered if they might be specialists.