Aristotelia thetica is a moth of the family Gelechiidae.

It is found in Australia, where it has been recorded from New South Wales and Tasmania.

The forewings are light bronzy fuscous sprinkled with dark fuscous, sometimes with some whitish scales and with a dark fuscous spot on the fold at one-fourth, and one beneath the costa at one-third.

The stigmata are moderate, dark fuscous, sometimes more or less surrounded with whitish, the plical very obliquely before the first discal, which is in the middle.

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