species in Belgium.
larva lives on Alnus
When fully fed, it cuts out an oval case, when excised is portable and
descends in it to the ground where it is attached to a stick. Pupation
in the case.
adults fly in two generations a year; from late May till June
again from July till August. The adults can be seen flying in sunshine
around alder branches. They come occasionally to light.
Luxembourg, Habay, 22 August 2009.
mine on Alnus glutinosa
(Photo © Jean-Yves Baugnée)