Appearance
The larvae feed on ''Quercus'', and supposedly also ''Prunus'' and ''Salix''. Full-grown larvae live in a black pistol case of about 8 mm, with a mouth angle of about 90°. The case is covered by a silken mantle that hangs from its rear end, and almost covers the case. The larvae mine the leaf from the underside, making many, unusually small fleckmines. Full-grown larvae can be found in early June.References:
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