Posted by Ectemnius on 30-04-2018 16:37
#2
Hello Volker,
It is a Eurytomidae, not a Pteromalidae. The shining and laterally slightly compressed abdomen with the heavily punctated thorax and head indicate this. They live in seeds and galls, so no surprise it turns up in Hexomyza galls. On bugguide a Eurytomidae is recorded from Hexomyza galls: https://bugguide.net/node/view/735603/bgimage
Kind regards,
Ectemnius