Last modified: Feb. 28, 2021, 3:14 p.m.
Rather common in many areas of Belgium.
See also bladmineerders.be
The larvae live gregariously in a slight web, on the leaves of the food plant and related cultivars, possibly also on other plants. Pupation in a cocoon amongst leaf-litter or spun up under a flower-head of the food plant.
The adults occasionally come to light.
The adults fly in two generations: from end of April till May, and again during July and August. In Belgium most specimens have been observed in July.
The larvae live on Sedum telephium.