Antaeotricha diacta is a moth of the Depressariidae family. It is found in French Guiana. The wingspan is about 17 mm. The forewings are white, faintly fuscous-tinged on the dorsal area and with dark fuscous markings. There is a streak from the extreme base of the costa to one-fifth of the dorsum. The first discal and plical stigmata are moderate, the plical posterior, connected with the dorsum before the middle by some fuscous suffusion. There is a cloudy line from the costa before the middle to three-fourths of the dorsum, widely interrupted beneath the costa, marked with a stronger dot in the disc, expanded into a suffused spot towards the dorsum. A curved line is found from three-fourths of the costa to the tornus, somewhat sinuate inwards toward the costa and there are eight marginal