Reference

Hans-Joachim Jacobs, Christian Schmid-Egger (2012): Crossocerus italicus de Beaumont, 1959 in the Southern Alps with a key to the species of the Crossocerus elongatulus species group (Hymenoptera, Crabronidae) – Ampulex - Zeitschrift für aculeate Hymenopteren – 5: 27 - 30.