Ercheia amoena is a species of moth of the Erebidae family. It is found in New Guinea. The wingspan is about 50 mm. The forewings are very variegated. The costal edge is narrowly blackish, irregularly dotted with ochreous and the costal area from the base to the postmedian line and a narrow area between the postmedian and subterininal lines are predominantly warm brown. There is a broad central streak from the base nearly to the postmedian and the terminal area is predominantly vinaceous. The hindwings are blackish fuscous, but pale and glossy at the costal margin.