Erechthias stilbella is a species of moth in the family Tineidae.

This species is endemic to New Zealand and is found in the North and South Islands.

This species inhabits native forest and bush and can also be found in domestic gardens.

[6] George Hudson discussed and illustrated this species in his 1928 book The butterflies and moths of New Zealand under that name.

The fore-wings are cream-coloured, faintly tinged with ochreous on the dorsum; there is a broad deep bronzy-black stripe from the base to the apex, running parallel with the dorsum; a very fine curved line from the costa et the base, joining the central stripe at about #; another very fine line from the costa at about 3⁄4 almost reaching the central stripe; a fine line along the costal edge from 3⁄4 to the apex and a black spot at the apex.