Dichomeris semicuprata is a moth in the Gelechiidae family. It was described by Meyrick in 1922. It is found in Peru. The wingspan is about 14 mm. The forewings are dark violet-grey with a fine yellowish supramedian line from the base to one-fourth, and two slight yellow marks between the apex of this and the costa. There is a moderate blackish fascia before the middle not reaching the dorsum. There is a coppery-brown-reddish patch occupying nearly all of the apical half of the wing, edged anteriorly with ochreous-whitish towards the costa. The hindwings are dark fuscous.