Acraea issoria, the yellow coster, is a small, leathery-winged butterfly. This species of the subgenus (Actinote) and the tawny coster (Acraea (acraea) terpsicore) with its sister species (A. (a.) moluccana) and (A. (a.) meyeri) of the nominotypical subgenus, are the only Asiatic representatives of the predominantly African subfamily Acraeinae.