Thiotricha glenias is a moth of the Gelechiidae family. It was described by Meyrick in 1908. It is found in Sri Lanka. The wingspan is 8-10 mm. The forewings are silvery-white, more or less tinged with ochreous and with the apical two-fifths orange-ochreous anteriorly suffused. There is a grey mark from the dorsum before the tornus, angulated inwards near the dorsum, then outwardly oblique, reaching more than half across the wing, a round black dot at the apex, and another on the termen, each preceded by a whitish dot. The hindwings are whitish-grey, thinly scaled, the apex tinged with orange and with a blackish apical dot.