The wingspan is 10–12 mm.[3] The forewings are dark slaty-fuscous, often paler-sprinkled, the stigmata hardly perceptible. The plical is followed by a whitish-ochreous dotand there is a small whitish-ochreous triangular spot, usually somewhat outwardly oblique, on costa at 2/3, occasionally obsolete; often a very small whitish-ochreous spot on tornus opposite.Vein 6 arises out of vein 7. Hindwings are rather light grey. The larva is blackish-grey; on 2-4 dorsal line and segmental incisions obscurely whitish; spiracular series of whitish spots; head and plate of 2 black.[4][5][6][7]
Adults are on wing from May to June and again from August to September in two generations per year.[8]
^Meyrick, E., 1895 A Handbook of British Lepidoptera MacMillan, London pdf This article incorporates text from this source, which is in the public domain. Keys and description
^Langmaid, J. R., Palmer, S. M. & Young, M. R. [eds]. 2018 A Field Guide to the Smaller Moths of Great Britain and Ireland [3rd ed.]Reading, Berkshire. British Entomological and Natural History Society