Epimimastis catopta is a moth in the Gelechiidae family. It was described by Turner in 1919. It is found in Australia, where it has been recorded from Queensland. The wingspan is 10-14 mm. The forewings are pale yellow with dark fuscous markings. There is a triangular spot on the costa from one-fourth to the middle, thickening towards the apex and a dot on the fold, another on the costa at two-thirds, an apical triangular spot traversed by a fine wavy oblique white line and a blackish terminal line around the apex. The hindwings are pale-grey.