Last modified: Jan. 13, 2019, 10:54 a.m.
Once a very local species occurring only in the south of Belgium. Extinct in our country.
The adults fly in two generations a year: in June and July, and in August-September.
The larva lives on Onobrychis viciifolia. It is attended by ants of the genera Lasius, Formica and Tapinoma. The species hibernates in an early larval stage.