white wild indigo (Baptisia alba) insect - Megachile brevis
Crocker twp, Polk County, Iowa, USA July 3, 2010 Size: approx 1 inch long
Thanks for the ID help, have attached a not-so-well focused additional pix of the same insect. Sure interesting how the anthers of this baptisia are just the right length to bump against this insect's behind as it pumps for nectar......