Last modified: March 5, 2021, 11:13 a.m.
Only known in Belgium from an old record: near Leuven (VB), 1855-07-07. Probably extinct.
Dark grey; head capsule dark brown; prothoracic plate and last abdominal segment black; pinacula black, white-ringed.
Whitish cocoon, pupa brown.
The egg is oviposited in April–May.
At first the caterpillar spins two leaflets together; later it feeds in the flowers which are contracted by silken threads.
The full-grown larva descends to the ground and construct a whitish cocoon among detritus in which it pupates.
The species hibernates in the adult stage. The adults are active at night and occasionally come to light.
One generation a year: July–September and after hibernation April–May.