species in Belgium.
monophagous larva makes a leafmine, usually starting close to a lateral
rib on of a
leaf of Alnus.
It's a slender winding gallery with narrow linear black frass leaving
clear margins from beginning till the end. Pupation in a dark reddish
adults fly in two generations; May and June and again during August.
Brabant, Zemst, 16 October 2008.
mine on Alnus
(Photo © Jorgen Ravoet)