Hubner's pero

It certainly looks a match to my (albeit untrained) eye! Pero morrisonaria seems even less common in middle Tennessee in any case.

Separating Hubner's Pero from Morrison's Pero (Pero morrisonaria) can be quite tricky. I'm suggesting Hubner's because of the deep sinus in the Post Median line of the forewing anf the realtively small amount of speckling along the outer margin of the wing. However, I'm not 100% sure. Have a look at the info' on http://bugguide.net/node/view/11622. I'm eliminating Pero honestaria because the PM line is not straight as it approches the inner margin of the forewing.

Thanks for your help Ian! I'm quite excited to see that this is quite an uncommon moth on both the bamona & moth photographers databases!