Did you know that BugGuide has 924 pages of moth photos, with 24 thumbnails per page? That's 22,176 moth photos to browse.
I thought it might be a geometrid moth. Limiting myself to Geometrid photos, I find 150 pages, 3,600 photos. So far, I've looked at over 2000 of them, and found none to match.
My eyes are tired.
~~~~~~~~~~Added: It's an Eurrhypara hortulata, Small Magpie Moth. Thanks to Seabrooke! (Comment # 3)