Hello,
I found this small female Elampini, H. roseum group, in a way in the grassland of Chaudanne (Besançon).
I think it is Hedychridium roseum roseum (not nanum, not chloropygum, not caputaureum?), but not sure (females valesianum are not metallic in the key on Chrysidids of Aosta), what do you think ?