Helicopis gnidus, the gnidus metalmark or spider-wing cupid, is a species of butterfly in the family Riodinidae.

In Helicopis gnidus the uppersides of the wings are mainly black, with a large orange basal area, followed by a broad patch of white.

The hindwings have iridescent patches (or "metalmarks") as well as several long tails.

This species occurs in the northern countries of South America, mainly in Suriname, Brazil, Peru and Colombia.

This Riodinidae-related article is a stub.