Aristotelia tetracosma is a moth of the family Gelechiidae.

The forewings are dark fuscous, with a faint purplish tinge and with an ochreous-white subtriangular blotch on the costa at one-fourth, reaching more than half across the wing.

A similar smaller spot is found on the costa before three-fourths, reaching half across the wing.

The hindwings are grey, darker posteriorly.

This article on a moth of the genus Aristotelia is a stub.