Reference
Christian Schmid-Egger, Ali Abdallah Ali Al Jahdhami (2018): New species of Ferreola LEPELETIER, 1845 and Eoferreola ARNOLD, 1935 with key to Ferreola species from the Palaearctic region (Hymenoptera, Pompilidae) – Linzer biologische Beiträge – 0050_1: 389 - 412.