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Agraulis vanillae
http://www.butterfliesandmoths.org/ident... This is a good site too. Doesn't have everything for the south east but it is helpful.
http://bugguide.net/node/view/494155
Forgot to give you a reference when I suggested the ID
Adorable! Sign it up for the "Butterflies and moths of the world-mission", I think theres people there who are able to help you with the ID.