|Amstelveen, the Netherlands; 7 July 2007. Male.|
|Amstelveen, the Netherlands; 16 June & 1 July 2007. Female.|
|Nysson species are cuckoo wasps: they lay their eggs in the nests of other species, where they kill the host species' egg or larva, and consume the prey brought in. N. maculosus might parasitize on Gorytes laticinctus or Harpactus lunulatus|
|Authority||:||(J. Forster, 1771)|
|Slenaken (Zuid-Limburg), the Netherlands; 5 May 2007.
Female on track just inside wood, bordering chalk down.