Cupha erymanthis has orange brown forewings in the basal area and black in the apical area with several subapical spots. Among them there are yellowish disc spots with three or four dark brown spots in spaces 2, 3 and 4. The hindwings are orange brown, there are lines on the marginal, submarginal and postdiscal with black spots in spaces 2 and 6. Underwings color are paler.
Larva: Cupha erymanthis larvae are cylindrical, cream-white, surface covered with small turbecles and short setae. The capsule of the head is yellowish brown with a black front. At the 5th instar stage, the caterpillar is dark red with a green tinge.
Pupa: Cupha erymanthis pupa is green, 18-19 mm long, in the dorso-lateral part there are 5 pairs of red processes with a black tip.