species in Belgium.
egg is laid on the upperside of Quercus.
The larva makes a slender gallery with linear or broken frass
leaving clear margins, following the midrib or a vein (usually outwards
towards the leaf margin), turns back and becoming abruptly a
rectangular blotch with the frass usually gathered along the side of
the blotch resting on the rib or in the corner where the larva has
back. Often several mines on the same leaf. Pupates outside the mine.
adults fly in one generation a year during June.
Namur, Gembloux, 11 June 2010.
© Jean-Yves Baugnée)