Last modified: Jan. 15, 2021, 7:12 p.m.
A common species throughout Belgium.
A yellowish white cocoon.
The larva makes a leaf mine starting close to the midrib of a leaf of Fagus sylvatica. The initial gallery leading away from the midrib and progresses in a series of "S" turns between the veins. Pupation in a pale yellowish white cocoon.
The adults fly in two generations: from late April to early June and again from July to August.
The monophagous larva makes a leaf mine in a leaf of Fagus sylvatica.