Last modified: Feb. 19, 2021, 2:27 p.m.
A rather rare species in Belgium.
The larva is blueish green.
The pupa is reddish brown.
The larva makes a mine, generally on the upper surface of the leaves of Pyrus communis. The mine is very compact, lying on a small surface, tends to cross over, especially the initial part of the corridor is contorted with a broad to sometimes very broad black frass line. The later part of the gallery ends sometimes in a secondary blotch. It pupates in a dark reddish brown cocoon.
The adults fly in two generations a year: during May and June and again during August.
The larva lives on Pyrus communis.