Harlequin Webworm Moth
Diathrausta harlequinalis
September 13, 2011
This little pyrausta has a handful of dopplegangers, the most sinister (because of its resemblence to this one) being Diathrausta reconditalis. I looked at a lot of photos of each and settled on harlequinalis for this ID.
The name refers to the more colorful - orange & boldly patterned - form of this moth.