Ethmia trifida is a moth in the Depressariidae family. It was described by Kun in 2004. It is found in Burma, Thailand, the Philippines and on Borneo and Sumatra. The wingspan is 40–45 mm. The forewings have seven spots at the basal part and five apical spots. There are three long black striae parallel with the costa and there is one spot at the middle of the wing. The hindwings are black, but yellow at the base.