Lethata illustra is a moth of the family Depressariidae.

The forewings are brown shaded with darker brown on the basal two-thirds and with the costa narrowly ochreous.

There is also a faint, outwardly curving transverse line from the costa above the spot to near the tornus.

The entire wing is sprinkled with fuscous scales.

This article on a moth of the subfamily Stenomatinae is a stub.