Semnostoma leucochalca is a moth of the family Gelechiidae. It was described by Edward Meyrick in 1918. It is found in Assam, India.[1]
The wingspan 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.[2]