Technical description and variation
''L. lamda'' F. (= ''rufescens'' Men.) (30 i). Forewing dark blue grey, very finely irrorated with olive brown; a short black streak from base below cell with rufous suffusion below it; another on submedian fold between inner and outer lines with dark suffusion above it; lines obscure, interrupted; orbicular stigma triangular, blue grey, outlined with black; reniform large, its lower lobe curved below and edged with black, filled up with rufous suffusion which basewards joins the orbicular; submarginal line ill-defined; hindwing brownish fuscous, darker towards termen; fringe brownish white: underside dull red; ab. ''zinckenii'' Tr. (30 i) is a much gayer insect ; the ground colour is pale silvery grey, and the dark suffusion deep olive, without the brown or rufous tint, which only exists, and that to a much smaller extent, in the lower part of the reniform; all the dark markings and the lines are emphasised with white; the submarginal line is distinct followed by a dark mangled shade; hindwing fuscous brown, with nearly white fringe; ab. ''somniculosa'' Hering (30 i) is smaller than the type, with darker, purplish grey, ground colour, the stigmata and lines hardly visible but with a distinct sinuous median dark olive shade; the two dark streaks both strongly expressed; hind-wing brown, with the fringe rufous. Larva blue green dotted with white; dorsal and subdorsal lines white; spiracular line yellow; spiracles white edged with brown. Warren. W. in 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 The wingspan is 39–44 mm.Biology
Adults are on wing from the start of September to the beginning of November and after overwintering from the end of February to mid May in one generation. The larvae feed on '' Myrica gale'', ''References
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