The wingspan is 32–45 mm. Forewing yellowish rufous, the rufous tint predominating in the male, the yellowish in the female; veins more or less tinged with grey; a dark smudge at lower angle of cell; an outer row of dark vein-dots; hindwing grey with a dark paler-edged outer line; a rare form, ab. liturata ab. nov. [Warren] has both lines complete and dentate throughout, the median vein thickly black; - in the Norfolk Fens a very dark form occurs, ab. fumata ab. nov. [Warren] with the wings, especially in the male, dark brown or black brown.[4]
Biology
Adults are on wing from July to September depending on the location. There is one generation per year.
The larvae are greenish dotted with black; head brown; thoracic plate pale green. The larvae bore the stems of Scirpus lacustris, Typha species and Iris pseudacorus.
^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
External links
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