Observations on nest building and behaviour of sphecid wasp Isodontia mexicana (Hymenoptera: Sphecidae) nesting in Zuid-Holland, the Netherlands

Pemphredon inornata♀︎

Spilomena beata♀︎

Passaloecus corniger♂︎

Pemphredon lugubris♀︎♂︎

Spilomena troglodytes♂︎

Crossocerus annulipes♀︎♂︎

Cerceris arenaria♀︎♂︎
(Sand tailed diggerwasp)

Sphecid wasps of the world: a generic revision

Ectemnius cephalotes♀︎♂︎

Omalus aeneus♀︎♂︎

Philanthus triangulum♀︎♂︎
(European beewulf)