Reference
James Michael Carpenter, Josef Alois Gusenleitner, Michael Madl (2010): A Catalogue of the Eumeninae (Hymenoptera: Vespidae) of the
Ethiopian Region excluding Malagasy Subregion. Part II: Genera
Delta de SAUSSURE 1885 to Zethus FABRICIUS 1804 and Species
Incertae Sedis – Linzer biologische Beiträge – 0042_1: 95 - 315.