Dichomeris instans is a moth in the Gelechiidae family. It was described by Meyrick in 1923. It is found in Brazil (Amazonas) and Peru. The wingspan is 10–11 mm. The forewings are ochreous sprinkled dark fuscous and with the costa irrorated dark fuscous from the base to a dark fuscous elongate mark at two-thirds. There are indistinct dark fuscous dots obliquely placed above and below the fold. The stigmata is blackish, the plical rather obliquely before the first discal and there is an undefined almost terminal fascia of dark fuscous suffusion rather broader above, leaving the edge ochreous with black dots. The hindwings are dark grey.