A not so common species in Belgium.

The monophagous larva makes a leafmine on Acer pseudoplatanus. 

The adults fly in two generations a year; during May and August. 

ID mine: a long contorted gallery, in the beginning the frass is linear, but thereafter the frass is dispersed (separated grains in a broad band) or linear (a small continuous central line), always leaving clear margins. The frass is never laid in arches. The two forms occur together, sometimes on the same leaf.