Thiotricha tetraphala is a moth of the Gelechiidae family. It was described by Meyrick in 1886. It is found in New Zealand. The wingspan is about 12 mm. The forewings are light grey, somewhat irrorated with grey-whitish in the disc. There are three dark grey spots, the first basal, the second triangular, in the disc before the middle, the third larger, oblong, beyond middle and resting on the submedian fold. The hindwings are grey.