Fraxinus ornus
The larvae feed on "Fraxinus excelsior" and "Fraxinus ornus". They mine the leaves of their host plant. The mine consists of an irregular small corridor with dispersed black frass. Often the corridor widens in the end into an irregular blotch with much less frass. The mine may begin at an egg shell, but the larvae can leave their mine and start a new one elsewhere in the leaf. In the latter case the corridor begins with a small round opening. Before the leaf is shed the larva leaves the mine and bores into the bark, where it hibernates. After hibernation they live as shoot borer or free among spun leaves.