Silver-Spotted Skipper on Purple Coneflower
Both butterfly and the coneflower are past their prime, but still worthy of a few pixels, I think.
According to BugGuide, Silver-Spotted Skippers range throughout southern Canada and most of the continental United States except the Great Basin and west Texas; northern Mexico.
Caterpillar Hosts: Many woody legumes including black locust (Robinia pseudacacia), honey locust (Gleditsia triacanthos) and false indigo (Amorpha species).
More information and photos are also available from Butterflies and Moths of North America.