Aristotelia trematias is a moth of the Gelechiidae family. It was described by Meyrick in 1913. It is found in South Africa, where it has been recorded from Mpumalanga. The wingspan is about 12 mm. The forewings are light fuscous irrorated with dark fuscous. The stigmata are rather large, blackish, the plical obliquely before the first discal, these two elongate. The hindwings are light grey.