Stegasta allactis is a moth of the family Gelechiidae.

The forewings are rather dark ferruginous fuscous, towards the dorsum between one-fourth and the tornus ferruginous ochreous sprinkled with dark fuscous.

There are three ochreous-white fasciae, becoming silvery metallic on the lower half, the first from the costa at one-fourth, outwardly oblique, the second median, vertical, including a dark fuscous dot above the middle, the third from three-fourths of the costa, inwardly oblique, interrupted in the middle.

The hindwings are light grey.

This article on a moth of the tribe Gelechiini is a stub.