Appearance
''P.fuliginaria'' L.Forewing blackish fuscous; lines yellowish ochreous, edged with black; the outer dentate, the subterminal waved ; a black mark at end of cell ; hindwing like forewing; — the ab. ''flava'' Horm., from the Bukowina, has in the male quite pale ochreous wings, with two blackish fasciae in middle of wing and almost obsolete terminal spots; the female is pale yellowish brown, with darker dusting, especially in the basal and terminal areas; — ab. ''carbonaria'' Esp. is wholly black. Larva black; dorsal stripe white, swollen in places, with a black line in middle; several fine, interrupted, wavy, whitish lateral lines; tubercles large, with long hairs, those on the sides and the hind pair on each dorsal segment orange; head black, with yellow lines. The wingspan is 18–28 mm. The length of the forewings is 11–14 mm.Behavior
The moth flies from June to October depending on the location.The larvae feed on various fungis, such as ''Fomitopsis betulina'', and ''Trametes versicolor'' and also on lichen.
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