Lethata fusca is a moth in the family Depressariidae.

The forewings are fuscous with a slight purplish hue and the costa is narrowly light rosy ochreous.

There is a dark fuscous dot in the fold at the basal third and a white spot at the end of the cell, edged with dark fuscous.

An outwardly curved, transverse row of dark fuscous dots is found at the apical four-fifths.

This article on a moth of the family Depressariidae is a stub.