Pyncostola semnochroa is a moth of the Gelechiidae family. It was described by Meyrick in 1913. It is found in South Africa, where it has been recorded from Mpumalanga and KwaZulu-Natal. The wingspan is 22-25 mm. The forewings are deep brown with the margins and veins marked with slender streaks of dark fuscous suffusion mixed with whitish. The hindwings are grey.