from Klimesch (1942a): youth mine and leaf cone
Oviposition at underside of midrib. From here a winding, epidermal corridor, resembling a snail’s trail, runs towards the leaf margin. Here a tentiform mine is made. The leaf margin folds over the mine, that in the end is half filled with frass. The larve then leaves the mine and continues feeding within a leaf folded into a cone. Pupa in an oval, almost glassy, cocoon. Mines only in the youngest leaves, mainly in the shadow.
Larve in May.
Macedonia, Istria (Klimesch, 1942a).
Hering (1957a), Klimesch (1942a).