The wingspan is about 13–16 millimetres (0.51–0.63 in). The forewings are dark fuscous. The posterior of the costa has whitish strigulae yellower beneath. There is a rather large yellow pentagonal median dorsal blotch, not nearly reaching the tornus and sometimes with a few dark fuscous scales. A streak from costa beyond the middle and the margins of ocellus are bluish metallic. The hindwings are dark fuscous, in male with blackish suffusion on 1c towards termen. The larva is whitish; head brown; plate of 2 pale ochreous.[3]
^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