''Lethata optima'' is a

moth Moths are a paraphyletic group of insects that includes all members of the order Lepidoptera that are not butterflies, with moths making up the vast majority of the order. There are thought to be approximately 160,000 species of moth, many of w ...

of the family

Depressariidae Depressariidae is a family of moths. It has formerly been treated as a subfamily of Gelechiidae, but is now recognised as a separate family, comprising about 2,300 species worldwide.Heikkilä, M. ''et al''. 2014: Morphology reinforces proposed mo ...

. It is found in

Peru , image_flag = Flag of Peru.svg , image_coat = Escudo nacional del Perú.svg , other_symbol = Great Seal of the State , other_symbol_type = Seal (emblem), National seal , national_motto = "Fi ...

. The

wingspan The wingspan (or just span) of a bird or an airplane is the distance from one wingtip to the other wingtip. For example, the Boeing 777–200 has a wingspan of , and a wandering albatross (''Diomedea exulans'') caught in 1965 had a wingspan of ...

is about 34 mm. The forewings are greyish overcast with reddish brown especially in the anal area and with the costa narrowly ochreous. The termen is ochreous with a purplish spot at the end of the cell with scattered white scales. The entire wing with scattered fuscous scales. The hindwings are whitish overcast with grey.''Proceedings of the United States National Museum'' 122 (3585): 18

References

Moths described in 1967 Lethata {{Stenomatinae-stub