Ethmia coronata is a moth in the Depressariidae family. It is found in south-central Mexico. The length of the forewings is 12.7–13.7 mm (0.50–0.54 in). The ground color of the forewings is dark gray, narrowly edged with white dorsally. The ground color of the hindwings is semitranslucent, white and reflecting purplish, becoming brownish in the apical area. Adults are on wing in June, September and October.