A rather rare species in Belgium, but probably overlooked in many places.

The larva lives at first in a narrow gallery filled with frass of Cornus mas, also Cornus sanguinea. Later on the gallery suddenly widenes to a blotch-mine. The larva constructs an oval case of 4-4.5 mm cut from the blotch, in which it drops to the ground. The larva hibernates in that case on or just below the surface of the soil and pupates in the next spring.

The adults fly in May and June and again in August. The moths are active in sunshine.