Females of this genus deposit one, sometimes more, eggs in a wound they previously have gnawed in the wall of a flower head of a thistle. Generally the egg is covered with a soon-drying secretion. The larva develops in the flower head, feeding on the developing achenes, sometimes also the receptacle. Also pupation takes place inside the flower head.

references

G├╝ltekin (2008a), Volovnik (2016a).

mod 13.v.2019