Ah thank you Alex, I've never seen this species. And indeed, rather late and so totally unexpected (to see sny gold wasp in the Netherlands in this time of year).
Although.... the information on
www.waarneming.nl puzzles me. But I don't know if it's correct. Very late (medio November) vs 'remarkably early' is contracdictory. A possible explanation is more than 1 generation in a year (but that means automatically that the host has also possibly 2 generations in a year).
Unfortunately the pics are insufficient to id it proparly I presume.
About Chrysis terminata:
"Recognition: A medium-sized gold wasp from the ignita group. Chrysis terminata is relatively easy to recognize within the ignita group by the four distinct nodules/small bumps on the forehead ridge. Furthermore, the teeth on the anal edge of the abdomen are quite sharp and the thorax and head dorsally have white hair.
Distribution in the Netherlands: Unclear. Since the host is fairly common, there is a good chance that C. terminata is also fairly common in our country.
Lifestyle: The species parasitizes the wall wasp Ancistrocerus nigricornis. C. terminata flies remarkably early in the year, the species can even be found in late February. It is therefore plausible that all observations of Chrysis ignita s.l. between January and the end of April all concern C. terminata.