The Yellow-banded Sapphire (Iolaus aphnaeoides) is a species of butterfly in the Lycaenidae family. It is endemic to South Africa, where it is restricted to the Afromontane forest of the East Cape, along the southern foothills of the Winterberge, from Bedford to Stutterheim and low-altitude forests north of Port St. Johns. The wingspan is 26–28 mm for males and 27–29 mm for females. Adults are on wing from October to January. There is one generation per year. The larvae feed on Tapinanthus kraussianus.