Andromica clearwing, Tatama National Park, Colombia

Quite noisy as this was taken at a distance with the tele lens in low light. This likely is the Greta andromica andromica sub species, based on a detailed checklist of Montezuma butterflies. Here's the checklist (warning: big file):
http://neotropicalbutterflies.com/colombiapdf/PDFs/PDF13 Montezuma_Mar03_2016.pdf