Last modified: Jan. 13, 2019, 8:39 a.m.
An uncommon and local species in the southern part of Belgium, always associated with calcareous soils. In 2 other provinces sporadically as a vagrant. Endangered!
The adults fly in two generations a year: from end of April till mid June, and from mid July till end of August. In favourable years a third generation occurs from the beginning of September till end of October.