rare and local species in Belgium.
young larva mines the leaf of Betula,
avellana and Castanea
Initialy the mine is a narrow gallery, often contorted and later
following a vein, the final chamber is often turned away at right
angles, the frass fills the gallery. Later the larva eats out windows
from either side, leaving the veinlets. Pupates in a greyish ochreous
cocoon spun amongst debris.
adults fly in one generation a year; during May and early
June. They come to
Limburg, Oostham, 30 July 2008.
(Photo © Chris Snyers)