Dichomeris argentaria is a moth in the Gelechiidae family. It was described by Meyrick in 1913. It is found in South Africa (Mpumalanga). The wingspan is 13-14 mm. The forewings are light yellow-ochreous with the costal edge slenderly suffused with dark fuscous from the base almost to the apex, beneath this with a faint pale iridescent-silvery streak from the base to two-third. A similar slender silvery streak is found along the fold from the base to one-fourth, and two silvery streaks from the costa before and beyond the middle converging towards the dorsum beyond the middle. The dorsal area beneath the fold is deep ferruginous, paler towards the base, the dorsum suffused with dark fuscous on the posterior half. There is a dark brown trapezoidal blotch resting on the dorsum and reaching h