A very rare and local species in Belgium. Hitherto only known from the province of Namur.

The monophagous larva lives in a tentiform mine on Chamaespartium sagittale. The mine is often long and strongly folded. The larva pupates inside the mine and hibernates.

The adults fly in two generations a year; onwards from late April till June, and again in August. They are mainly active at dusk and come to light.