Dichomeris thrasynta is a moth in the Gelechiidae family. It was described by Meyrick in 1914. It is found in Guyana. The wingspan is 8-9 mm. The forewings are grey, mixed with whitish and dark fuscous and with a blackish dot in the disc at one-fifth. The stigmata is large, black, pale-edged, with the plical rather obliquely before the first discal, the second discal often connected with the dorsum by a transverse mark of dark fuscous suffusion. There is also a more or less curved whitish line from two-thirds or three-fourths of the costa to the tornus. The hindwings are grey, in males with the margins of the lower median vein hyaline towards the base.