Thiotricha embolarcha is a moth of the Gelechiidae family. It was described by Meyrick in 1929. It is found in Indonesia (Java). The wingspan is about 19 mm. The forewings are ochreous-whitish partially tinged fuscous and with the costal edge dark fuscous from the base to the middle. The markings are formed by light fuscous suffusion mixed darker fuscous. There is a streak beneath the basal fourth of the costa and some light suffusion in the disc anteriorly, with a spot of darker suffusion resting on the costa before the middle, from this a dark line runs beneath the costa to four-fifths. A dark oblique-triangular blotch occupies the basal two-fifths of the dorsum, from its apex a dark attenuated streak runs to the apical spot. There is a short dash at the tornus, preceded by a small elong