Appearance
The wingspan is 27–30 mm. The length of the forewings is 14–16 mm. Forewing brownish fuscous with a violet sheen; the lines double; claviform stigma large, black; orbicular and reniform grey with yellowish or whitish outlines, conversely oblique and contiguous on median vein; veins dark outlined with grey; submarginal line yellowish or white, dentate; hindwing brownish fuscous, darker in female: the ab. ''behenis'' Frr. has the outer half of costa of forewing pale; — ''S. mandarina'' Leech from Japan and China, is rather larger and darker, the markings in consequence somewhat less distinct.Behavior
The moth flies from April to September depending on the location. There are two generations per year.Larva greenish grey or yellowish, dotted with white: dorsal line dark with a row of oblique reddish grey stripes on each side. They feed on various low-growing plants, such as ''Silene'' species , ''Lychnis'' spp. and ''Cucubalus baccifer fr''. At first, they feed on the flowers and seed-capsules, eating the seeds, later they also feed on the leaves.
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