Waarneming.nl admin Hans Nieuwenhuijsen, expert on Pompilidae, indicates that the wasp is not Auplopus carbonarius like I had determined but:
a female Agenioideus sericeus [1,2], with captured orb-web spider Zygiella x-notata (det. johanb).
This is a very rare wasp in the Netherlands that until recently only occured in Limburg , the most southern province, but may be expanding northwards according to Hans. This wasp has a preference for Zygiella x-notata. The observation and comment by Hans can be found here.
An awesome observation!! Only bummer is that I did not get the species correct the first time 😅. In hind site the differences between the species are clear.
A nice little wasp that I hadn’t seen before. She pulled the spider across the ground but unfortunately I did not see what she did with the spider as I was distracted by another insect that was my target at the time.
References1 Nederlands Soortenregister
2 NIEUWENHUIJSEN, Hans. De spinnendoders van Nederland (Hymenoptera: Pompilidae). Jeugdbondsuitgeverij, 2008.
3 Peeters, T.M.J., C. van Achterberg, W.R.B. Heitmans, W.F. Klein, V. Lefeber, A.J. van Loon, A.A. Mabelis, H. Nieuwen-huijsen, M. Reemer, J. de Rond, J. Smit, H.H.W. Velthuis, 2004. De wespen en mieren van Nederland (Hymenoptera: Aculeata). – Nederlandse Fauna 6. Nationaal Natuurhistorisch Museum Naturalis, Leiden, knnv Uitgeverij, Utrecht & European Invertebrate Survey – Nederland, Leiden.