Adults of this species fly at night from June to August [1] and will come to light and sugar but are not especially strongly attracted.

(3a), occurring in N. Europe and the commoner form in Britain, has the wings dusted with grey, and the markings more developed.

semivirga Tutt has the outer margin of forewing broadly grey.

(3 a) confined to Eastern Asia and Japan, the forewing is greyish white with indistinct markings.

[1] The larva is green, covered in long white or yellow hairs.