Aroga mesostrepta is a moth of the Gelechiidae family. It is found in Japan, the Russian Far East and Korea. The wingspan is about 18 mm. The forewings are blackish with white markings. There is a narrow oblique fascia from the costa, connected on the dorsum by narrow streaks with the base and with a narrow irregular ill-defined postmedian transverse fascia which forms a slender abrupt loop inwards in the middle. There are opposite triangular spots on the costa and tornus, as well as ill-defined terminal dots. The hindwings are grey.