Last modified: April 30, 2021, 11:08 a.m.
Still a very rare species, but it can be locally fairly common, especially in the chalk and limestone area's in the southern part of Belgium.
The larva lives at first mining in a petiole of the food plant and later in a silken gallery in the rootstock, where it eats the bark.
Pupation in a firm cocoon of silk and detritus on the ground.
The adults are active during the day in bright sun. They fly around the food plants, especially in sunny days.
The adults fly from mid April till mid June, sometimes as late as mid July.
Mainly on chalk and limestone grassland.