uncommon species in Belgium.
monophagous larva makes a leafmine in Betula, the frass is laid in a
small black central line from beginning of the mine till the end.
adults fly in one generation a year; from late April towards early June.
Brabant, Cortil-Noirmont, 25 August 2011.
mine on Betula pendula
(Photo © Jean-Yves Baugnée)