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Amata sp.
Erebidae, Arctiinae, Syntomini, Amata sp., I would say. Please, verify and not that you can't trust most of the Amata IDs on the internet. Not even Ryan can ID his. There are several species in your area, all look almost identical, check all shape and locations of the spots. Common ones are Bicincta and Cyssea.
http://www.drkrishi.com/handmaiden-moth#...
http://en.wikipedia.org/wiki/File:Amata_...
http://www.flickr.com/photos/garyts_phot...
Tricky group!!