A rare species in Belgium.

The larva mines in a leaf of Quercus and rarely also on Castanea sativa, usually in yellow, often fallen leaves, in a green island. The initial mine is small and filled with frass usually near the leaf-stalk or another vein. Later it ends abruptly in a blotch which contains a lot of frass. Pupates outside the mine.  

The adults fly in one generations a year during June and July.