Memphis beatrix is a species of leafwing found in South America (Costa Rica, Panama, Colombia and Ecuador).
Memphis beatrix is a butterfly with a wingspan of about 50 mm, with forewings with a humped costal edge, angular apex, almost straight outer edge, hook-like inner angle and very concave inner edge. Each hindwing bears a tail. The upper part is navy blue, almost black, with a more or less important metallic blue basal part and decorated on the forewings with a few blue spots near the apex. The underside is dark grey with metallic reflections and simulates a dead leaf.Seitz- A. beatrix Druce (120 C b) from Chiriqui is an imposing species. The female is beneath much greyer than the male. Seems not to be rare..
The host plants of its caterpillar are Piper.