Graphisurus fasciatus ♀.
Size: approx. 15 mm. Photo: 08/22/14, 11 pm.

This flat-faced longhorn, Graphisurus fasciatus, prefers hardwood trees and pines. It is wide-spread throughout the eastern half of the country. The genus has three species in the US with G. fasciatus being the most frequent one in Florida and Georgia. 
bug guide (this photo):