This is a female.

David Geale, an expert on neotropical butterflies and especially the species in Tatamá National Park, helped me identify this butterfly.
I had the great fortune to meet David at the Montezuma Lodge in Tatamá National Park during our visit.
He told me that he had never seen a Salatis species and it therefore could be an undescribed species.
They are poorly known and probably al least partly nocturnal.

Montezuma Lodge area, Parque Nacional Tatamá, Risaraldas, Colombia, 27 June 2015