I found a small group of beautiful colored bugs in Great willowherb (Epilobium hirsutum), Cinnamon bugs (Corizus hyoscyami).

These bugs are called cinnamon bugs as they apparently they smell like cinnamon when touched… I need to test that claim some day.
At first I though they were Firebugs but those bugs have a different drawing with more articulate lines and the head is completely black.

Literature