The wingspan is 23–26 mm. Forewings dark fuscous, sprinkled with yellow-whitish; first line indistinct, preceded by a whitish dot; second dark fuscous, posteriorly with a waved whitish-yellowish edging, middle third forming a quadrangular projection including a pale whitish-yellowish blotch, below this with a loop inwards enclosing a whitish-yellowish spot; orbicular dot and transverse discal mark darker, separated by a square whitish-yellowish spot. Hindwings as forewings, but anterior markings obsolete, posterior pale blotches much enlarged. The larva is whitish-green; dorsal and subdorsal lines green; incisions yellowish; on 3 and usually 4 a black lateral spot.[3]
The moth flies from May to August depending on location.
^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