Last modified: Jan. 13, 2019, 9:02 a.m.
A rare and local species occuring in 2 provinces of Flanders, only known from the Kempen. In some areas locally fairly common. Threatened!
The adults fly in one generation a year: onwards from early July till end of August.
The larva lives on Gentiana pneumonanthe and is attended by ants of the genus Myrmica.