Acronicta innotata - Unmarked Dagger
Compare with the similar Birch Dagger (Acronicta betulae), which is, oddly enough, less heavily marked.
Carroll Co., VA 6/13/09
Carroll Co., VA 7/2/06
Carroll Co., VA 7/13/07
Carroll Co., VA 7/14/07
Carroll Co., VA 7/14/07
Carroll Co., VA 7/15/07