Stegasta allactis is a moth of the family Gelechiidae. It was described by Edward Meyrick in 1904. It is found in Australia, where it has been recorded from South Australia and Western Australia.[1]
The wingspan is . 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.[2]