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Heliconius erato petiveriana
It is either Heliconius erato petiverana OR Heliconius melpomene rosina. See comment below.
Could also be Heliconius melpomene rosina, Postman. You can't separate them from an open wing shot, you need a ventral view. And do not forget all the variation within both species. Do you have one? Otherwise I would go with Heliconius sp. with mentioning both candidates in the description.
http://www.butterfliesofamerica.com/heli...
http://www.butterfliesofamerica.com/heli...