Last modified: Sept. 30, 2022, 10:45 a.m.
A very rare and local species in Belgium.
Whitish with transparent skin. Head and the three thoracic plates shining black.
A long oval case, somewhat constricted in the centre, up to 8 mm long. Small plant particles and soil are used to enlarge it during growth.
The eggs are oviposited in the flowers of Succisa pratensis. Caterpillars have been observed feeding till hibernation an they continue feeding during wintertime under warmer conditions. The adults often sit on the flowers of other plants than the food plant, like Angelica sylvestris, and swarms of males have been observed during warm and moist weather conditions.
One generation a year from July till mid-August.
Wet habitats where the food plant grows.