''Semnostoma leucochalca'' 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 Gelechiidae. It was described by Edward Meyrick in 1918. It is found in

Assam Assam (; ) is a state in northeastern India, south of the eastern Himalayas along the Brahmaputra and Barak River valleys. Assam covers an area of . The state is bordered by Bhutan and Arunachal Pradesh to the north; Nagaland and Manipur ...

, India. 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 14 mm. The forewings are dark fuscous, variably marked with white and brassy yellow, especially a number of irregular confluent markings occupying the dorsal area beneath the fold, and a dark blotch on the costa at one-third which is more or less outlined by irregular markings, but all very variable. There are three or four white marks posteriorly converging to a small black subapical spot edged anteriorly and above with silvery. The hindwings are light grey.Meyrick, Edward (1916–1923)
''Exotic Microlepidoptera''. 2 (4): 127.

References

Moths described in 1918 Pexicopiini Taxa named by Edward Meyrick {{Apatetrinae-stub