Nyceryx magna

Nyceryx magna is a moth of the family Sphingidae. It is known from Brazil, Costa Rica and Ecuador.

It can be distinguished from other Nyceryx species by the dark forewing upperside and the brownish-orange basal area and pale purple bands in the tornal angle of the hindwing upperside.

Adults are on wing year round.

The larvae feed on Pentagonia donnell-smithii. Early instar larvae have very large heads and elongated tails. The head has a distinctive blue-green colour in the final instar and the tail is shorter and rough. The pupa is smooth and shiny with alternating light and dark bands on the abdomen.