Erechthias exospila is a species of moth of the family Tineidae. It was first described by Edward Meyrick in 1901. It is endemic to New Zealand and can be found in the North Island as well as the Poor Knights and D'Urville Islands. This species inhabits native forest. Larvae of species in the genus Erechthias feed on dead plant debris or the tough leaves of plants such as palms. E. exospila frequents the dead leaves of Astelia. Adults have been observed in November and February. Specimens of this species have been collected via malaise trap and beating shrubs.

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