Prolita thaliae 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 California, Colorado, Utah and Wyoming. The wingspan is 19-20.5 mm. The forewings are off-white, pale buff, pale yellow, and brown with the ridges of many scales white or off-white. The hindwings are pale fuscous, with the veins and costal margin shining pale orange. The larvae feed on Chrysothamnus nauseosus.