Ethmia duckworthi is a moth in the Depressariidae family. It is found in Panama and Costa Rica. The length of the forewings is 11.9-13.4 mm. The ground color of the forewings is whitish, more or less uniformly covered by irregular, mostly ill-defined, dark brownish gray longitudinal streaks and spots. The ground color of the hindwings is semi-translucent whitish basally, becoming dark brown at the apical area and along the dorsal margin.