The wingspan is 12–14 mm. The forewings are fuscous with a narrow irregular yellowish subcostal streak from the base to about two-thirds, tending to form branches posteriorly, but in males sometimes wholly absent. The hindwings are grey, in males with a median fringe of long hairs from the base to two-thirds, directed downwards and reaching a slender irregular pale ochreous subdorsal streak, terminating in an elongate infuscated spot on the fold before pre-flexus.
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