Lethata buscki is a moth in the family Depressariidae. It was described by W. Donald Duckworth in 1964. It is found in Belize, Honduras and Mexico.
The wingspan is . The forewings are deep ochreous with the costa rose. There is a spot at the end of the cell, composed of a ring of fuscous surrounding white scales. The hindwings are light ochreous slightly overcast with grey scales.