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Gastrophora henricaria
This is what referred by Wiki...
http://web.archive.org/web/2008080323001...
May help you in future...
Hi Lori got it accurately...
I was trying with suspect of Geometridae... but not able find sub family Oenochrominae where this moth is classified. Bugguide not included this subfamily.
It's a male, which you can tell from the large fuzzy antennae. Females have slender antennae.
Also known as Underwing moth..spectacular contrast between over and under wings..!!