Stomopteryx prolapsa is a moth of the family Gelechiidae. It was described by Edward Meyrick in 1918. It is found in Sri Lanka.[1]
The wingspan is about 10 mm. The forewings are dark fuscous with a large white subtriangular spot on the dorsum before the tornus, reaching halfway across the wing, and a similar costal spot slightly beyond and nearly confluent with it. The hindwings are dark grey.[2]