Stegasta postpallescens is a moth of the family Gelechiidae. It was described by Walsingham in 1897. It is found in the West Indies, where it has been recorded from Grenada[1] and Cuba.
The wingspan is about 9 mm. The forewings are brownish fuscous, sparsely sprinkled with ochreous scales. A creamy-ochreous dorsal streak occupies one-third the width of the wing and runs from the base through the tornal cilia and a small creamy-ochreous costal spot lies at one-fourth from the apex, and a few pale ochreous scales are visible at the base of the brownish-fuscous terminal cilia. The hindwings are grey.[2]