rather rare species in Belgium, but probably overlooked in many places.
larva lives on Cornus
sanguinea and C.
At first it makes a small narrow gallery along the leaf margin
and later it suddenly widenes to a
blotch-mine, which often absorbs the early gallery. The larva
constructs an oval case of 5,5-7 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
adults fly in one generation a year; onwards from late April till June. The moths are
active in sunshine.
Brabant, Evere, 20 April 2011.
(Photo © Bart Hanssens)