Thiotricha xanthaspis is a moth of the Gelechiidae family. It was described by Meyrick in 1918. It is found in India (Assam). The wingspan is about 11 mm. The forewings are shining white with an ochreous-orange suffused blotch extending along the apical third of the costa. There is a narrow irregular line from the costa rather inwards-oblique dark fuscous fascia at two-thirds, sometimes not quite reaching the margins. There is a small blackish dot just above the apex, and one on the termen slightly anterior. The hindwings are grey, the costa and termen are suffused dark grey, the apex are pale orange.