If I am not mistaken, this is a female Sachem (family Hesperiidae), one of the widespread skippers. Its range extends from the eastern U.S. and southeastern Canada to California in the west and to Mexico and Brazil in the south.
Both pictures are of the same individual. I photographed it near Lake Artemesia, College Park, Maryland last September. Females are identified by the chevron pattern on the lower sides of their hindwings and 2 large white spots on the upper sides of their forewings1.
Some good pictures of the Sachem are available here.
1. Glassberg, J. Butterflies through Binoculars. The East. Oxford U. Press. 1999.