Thiotricha galenaea is a moth of the Gelechiidae family. It was described by Meyrick in 1908. It is found in Sri Lanka. The wingspan is about 16 mm. The forewings are shining ochreous-white with an indistinct grey very acutely angulated transverse line about three-fourths, not reaching either margin. There is some grey suffusion towards the termen and a white almost marginal line along the posterior part of the costa and termen, at the apex preceded by an orange dot and followed by a black dot, where a blackish line proceeds along the upper part of the termen. The hindwings are whitish-grey, towards the apex whitish-ochreous and with a blackish apical dot.