Last modified: Feb. 19, 2021, 1:45 p.m.
A common species in Belgium.
It makes a fine gallery filled with linear frass, widening abruptly into a blotch, usually at the edge of the leaf.
See also bladmineerders.be
It pupates in a cocoon spun on detritus.
The adults fly in two generations: April-May and July-August. In favourable seasons a third generation occurs in the autumn.
The larva lives on Crataegus.