Horned Spanworm moth

I think this is either Nematocampa resistaria or Nematocampa brehmeata. Unfortunately, the two species can only be told apart by genitalia examination. However, given your location, Nematocampa resistaria is more likely.
http://mothphotographersgroup.msstate.ed...
http://mothphotographersgroup.msstate.ed...

http://www.projectnoah.org/spottings/736... here is one from last fall

http://www.projectnoah.org/spottings/127... and one that looks more like the Lambdina you gave me the link to

I see these every year, and always with the border. They are quite small.... I suspect smaller than Lambdina

This looks a lot like Lambdina fiscellaria, the Hemlock Looper, but I can't find one with your gray border markings: http://bugguide.net/node/view/9655/bgpag...