Parapsectris fastidiosa is a moth in the Gelechiidae family. It was described by Meyrick in 1911. It is found in South Africa (Limpopo) and Namibia. The wingspan is about 13 mm. The forewings are ochreous-yellow with an oblique series of three minute black dots running from beneath the costa near the base towards a fuscous spot on the dorsum before the middle. There is a black dot beneath the costa beyond one-third and a triangular fuscous spot on the costa beyond the middle, and an irregular blotch before the apex. An irregular fuscous blotch is found on the dorsum before the tornus, its upper angles forming irregular projections reaching more than half across the wing, between which is a black dot representing the second discal stigma. The hindwings are grey.