The wingspan is 14–18 mm. The forewings are blackish with a narrow very slightly sinuate white fascia beyond middle ; tips of cilia white. Hindwings are as forewings, but fascia slightly curved.[1]
The moth flies from May to August depending on the 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