Appearance
The length of the forewings is 13–16 mm. The moth flies from May to October depending on the location.Forewing narrower and greyer, less purple, than ''Polypogon lunalis'' Scopoli, 1763, sometimes with a yellowish flush; the inner and outer lines nearer together; the subterminal line simple, brown without any shade before, slightly concave outwards; the cell lunule obscurer; hindwing paler grey, the subterminal dark, strongly white-edged externally; the ab. ''bidentalis'' Hein. is paler grey, with a faint yellowish or rufous flush, the sub-terminal line of hindwing hardly angled.Behavior
Larva dull grey; the dorsal line greyish black; tubercles black ringed with yellowishgreen; spiracles black; head black brown.
The larvae feed on fallen leaves of European Beech, Oak and Rubus.
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