... caught me this beautiful Chrysis in La Verdière (83560, Var, France) ten days ago with a yellow plate. I think it's something near that Chrysis rutilans ore more probably insperata for the scutum and third tergum blackish, but the shape of apical margin with the two central teeth very close ...
You're right this is a male of Hedychrum, but this is not Hedychrum virens. Specimens of Hedychrum virens usually may have double size compared to the Hedychrumrutilans that you see on the same flower. Unfortunately we cannot identify this one.
... for nesting but I assume the substrate is favourable. Also present is Hedychrumrutilans, kindly identified in this forum (post on 21 August). At first I didn’t recognise ...
... some Chrysidid (often less than 5 by session, except some station when Hedychrumrutilans is very abundant), and I don’t have opportunities to photograph specimens in natura. ...