Lethata mucida is a moth of the family Depressariidae. It is found in Colombia."Lethata Duckworth, 1964" at Markku Savela's Lepidoptera and Some Other Life Forms
The wingspan is about 28 mm. The forewings are as in Lethata obscura, except with heavy suffusion of purplish in the anal area. The hindwings are whitish, heavily overcast with grey scales.Proceedings of the United States National Museum 122 (3585): 17
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