The Natal Yellow-banded Sapphire (Iolaus diametra) is a butterfly of the Lycaenidae family. It is found in Africa, roughly from South Africa to Ethiopia. The wingspan is 26–28 mm for males and 27–29 mm for females. Adults are on wing from July to December with a peak in October in South Africa. There is one generation per year. The larvae of ssp. natalica feed on Actinanthella wylliei. Other recorded foodplants are Oliverella hildebrandtii and Englerina woodfordioides.