Appearance
The wingspan is 30–40 mm. Adults have a two-coloured forewing. The lower half is greyish brown and the upper half is light to dark brown. These are separated by a doubly toothed blackish band with a variable white edging. The hindwings are brown, although somewhat darker toward the margin. They are on wing from April to September and again from May to August in one generation per year in the north.
Food
The larvae feed on the leaves of ''Ulmus'' species. They are chalky-green and are similar to the leaf edges of the host plant. Larvae can be found from June to October.References:
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