Hedychridium roseum has a nonmetallic, carneol-like abdomen, this one is metallic. This is a Holopyga sp., for example the medial vein is characteristically bent in the middle, in Hedychridium (and Hedychrum) it is weakly and evenly arched along its whole length.
My guess would be a female Holopyga generosa, but I'm far from certain.