An unexpected new garden species, Gasteruption jaculator . I noticed her at the end of the day flying on the bee hotels which she inspected thoroughly. She parasitizes Hylaeus and Colletes bees . The first group is present on hotels but she did not parasitize a nest and unfortunately did not return after this day.
References1 Nederlands Soortenregister
2 Kees van Achterberg, 2013. "de nederlandse hongerwespen (hymenoptera: evanioidea: gasteruptiidae)"