Greenstreak

Forgot one: Amyntor: http://butterfliesofamerica.com/cyanophrys_amyntor.htm

Tricky group! There are several in your area: Tropical Greenstreak, Herodotus: http://www.neotropicalbutterflies.com/Site%20Revision/Pages/HairstreakPages/Callophrys_Section/Callophrys_Pages/Cyanophrys_herodotus.html http://butterfliesofamerica.com/cyanophrys_herodotus_live1.htm Remus: http://www.reservacostanera.com.ar/la-fauna/invertebrados/mariposas-y-polillas/frotadora-esmeralda-coluda-cyanophrys-remus/ Acaste: http://www.mundobutterfly.com.ar/Imagenes/Acaste.html Argentinensis: http://www.butterfliesofamerica.com/L/cyanophrys_argentinensis_types.htm I really can't tell you which one it is actually.

It's clearly a lycaenid. They differ markedly on the verso side, so I have no idea of the generic name. Green camo is quite unusual. Nice shot asergio.