Oxyna flavipennis female · margasparnė ♀

EN · clouded yarrow fly, Achillea fruit fly
DE · Schafgarben-Bohrfliege, Schafgarbenbohrfliege

The larvae feed inside galls on yarrows (Achillea) roots. Gall more or less globular, brown swelling at the root collar, up to 8 mm, often several together. The gall mostly is unilocular and has a thick, fleshy wall. The solitary larve pupates in the ground.
1880