Prolita dialis is a moth of the Gelechiidae family. It was described by Hodges in 1966. It is found in North America, where it has been recorded from Arizona, New Mexico, Texas and Mexico. The wingspan is 17.5–20 mm. The forewings are buff white to buff, with a dark brown spot. The hindwings are shining pale fuscous, with the veins darker and tinged with yellow grey.