The wingspan is 43–52 mm. Forewing pale or dark lilac grey, more or less suffused with grey brown, especially in costal half; a slight dark basal streak below median vein; claviform stigma outlined with black: orbicular and reniform large, paler, with dark centres; reniform with white on outer edge and often followed by a rufous patch; submarginal line preceded by blackish wedge-shaped marks, and acutely indented on submedian fold; hindwing brownish fuscous; — specimens in which the glaucous tint predominates are ab. nitens Haw.; — the much rarer uniformly reddish brown form is unicolor Tutt - flavescens Spul., from the Bukowina, has the forewings pale brownish yellow; — ab. mongolica Stgr. the common form in central and eastern Asia is uniformly darker grey brown with a reddish undertone, the submarginal line equally distinctly indented.[1]
Moth and larva in Karl EcksteinDie Schmetterlinge DeutschlandsLarva and moth (figures 10a, 10b)
Biology
The moth flies from May to July depending on the location.
^Seitz, A. Ed., 1914 Die Großschmetterlinge der Erde, Verlag Alfred Kernen, Stuttgart Band 3: Abt. 1, Die Großschmetterlinge des palaearktischen Faunengebietes, Die palaearktischen eulenartigen Nachtfalter, 1914
