"Elachista" cataptila is a moth with an unclear taxonomic position. It was described by Meyrick in 1897. It is found in Australia, where it has been recorded from Western Australia. The wingspan is 7-8 mm. The forewings are grey-whitish, irrorated with black or dark grey. There is an ill-defined blackish discal streak from the base to near the middle. The plical and second discal stigmata are black. The hindwings are grey.