Last modified: Dec. 12, 2020, 11:16 a.m.
A very rare and local species in Belgium, almost exclusively observed in the limestone area.
Hibernates as a part-grown larva on a twig of the food plant. Pupates in a though cocoon.
The adults fly in one generation a year; mainly in June and July. When conditiones are favourable, a partial second generation occurs during September. They come to light.