Ardozyga euprepta is a species of moth in the family Gelechiidae. It was described by Turner in 1933. It is found in Australia, where it has been recorded from Queensland. The wingspan is about 18 mm. The forewings are white with fuscous markings. There are four costal dots, sub-basal, at one-sixth, the middle, and two-thirds. There is also a broad streak on the dorsum from near the base to beyond the middle and a large oval outwardly oblique spot in the disc before the middle, its lower and outer end confluent with the dorsal streak. There is a large tornal blotch, connected with the costa at five-sixths and a suffused spot on the mid-termen, as well as a blackish terminal line. The hindwings are whitish-ochreous with a large pale fuscous apical blotch.