Hallo Alex
,
Englich with Google Translator.
> then it must be a female Hedychrum.
Holopyga generosa is not present in the biotope. Very often Hedychrum be found nobile
In present biotope is as host only Cerceris arenaria, Cerceris quinquefasciata, etc ..
Not present is Philanthus triangulum.
So presumably remains only Hedychrum. For the region are reported: H. gerstaeckeri, H. niemelai, H. nobile, H. rutilans.
It remains almost exclusively Hedychrum gerstaeckeri CHEVRIER 1869. But that is uncertain.
Greetings from Flensburg,
Horst