Antaeotricha tumens is a moth of the Depressariidae family. It is found in French Guiana. The wingspan is about 17 mm. The forewings are fuscous-whitish, with a faint lilac tinge, white on the costal edge and between the veins posteriorly. There is a fuscous basal dot in the middle, and a short oblique mark above the base of the dorsum and three cloudy dark fuscous oblique transverse lines, the second and third triangularly dilated on the costa, the first from one-fifth of the costa to the middle of the dorsum, slightly curved, the second from the middle of the costa to four-fifths of the dorsum, slightly sinuate outwards in the middle, the third from three-fourths of the costa to the tornus, curved outwards on the lower half, the dorsal area between this and the second partially suffused