Strongylium tenuicolle.
Size: approx. 20 mm. Photo: 08/16/14, 11 pm.

This Darkling Beetle was attracted to our porch light. It lives on broad-leaved trees (e.g. oaks) and is rather common in our area. This particular specimen is a rare color variation that has bright red or orange legs (rather than the usual black ones). This variation occurs only in the Southeast. 
bug guide (this photo):