Ethmia lesliesaulae is a moth in the Depressariidae family. It is found in Costa Rica, where it has been recorded from both sides of the Cordillera Volcánica de Guanacaste al altitudes ranging from 300 to 645 meters. The habitat consists of rain forests. The larvae feed on Drymonia macrophylla, Drymonia serrulata, Drymonia warszewicziana and Drymonia alloplectoides.