Bee hotel:
Crossocerus vagabundus ♀︎

Bestimmungsschlüssel der Grabwespen Nord- und Zentraleuropas (Hymenoptera, Sphecidae)

De graafwespen van de Benelux

Die Grabwespen Deutschlands. Bestimmungsschlüssel

The Sphecidae (Hymenoptera) of Fennoscandia and Denmark

Die Grabwespen Deutschlands

Gasten van bijenhotels

Hymenoptera Aculeata Westfalica Familia: Sphecidae (Grabwespen)

Myrmica rubra (Hymenoptera, Formicidae) worker ants, unusual prey of the digger wasp Crossocerus vagabundus (Hymenoptera, Crabronidae)

Nederlandse Fauna 6

Sphecid wasps of the world: a generic revision

Sphecid wasps of the world: a generic revision

THE BIOLOGY OF THE BRITISH CRABRONIDAE

Venoms of the hymenoptera

Wasp fauna (Hymenoptera: Bethylidae, Chrysididae, Dryinidae, Tiphiidae, Mutillidae, Scoliidae, Pompilidae, Vespidae, Sphecidae, Crabronidae & Trigonalyidae) of Mordovia State Nature Reserve and its surroundings in Russia