Semnostoma leucochalca is a moth of the family Gelechiidae.

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] This article on a moth of the subfamily Apatetrinae is a stub.