Source: Butterflies of Central Texas A Guide to Common and Notable Species
All the markings seem right but I have never seen a pearl crescent this dark.
The Pearl Crescent (Phyciodes tharos) is a butterfly of North America. It is found in all parts of the United States except the west coast, and throughout Mexico and parts of southern Canada, in particular Ontario. Its habitat is open areas such as pastures, road edges, vacant lots, fields, open pine woods. Its pattern is quite variable. Males usually have black antennal knobs. Its upperside is orange with black borders; postmedian and submarginal areas are crossed...