Eudonia epicremna is a moth in the Crambidae family. It was described by Meyrick in 1885. It is found in New Zealand. The wingspan is 14–15 mm. The forewings are fuscous, mixed with yellow-ochreous. The median third is mixed with white and there is a small white basal spot, as well as a white spot on the costa near the base. The hindwings are fuscous-grey, the hindmargin suffused with dark fuscous. Adults have been recorded on wing in January.