Si un de nos spécialistes en Sphéciformes valide la tribu, on pourra valider le genre. Mesopalarus ne comporte qu'une espèce: Mesopalarus mayri. Elle vie au sud de l'Afrique et l'

Palarus ambustus Klug, 1845 (Algeria, Egypt, Turkey). Palarus almeriensis cité par Eugène serait en fait la ssp espagnole d'après WaspWeb: P. ambustus almeriensis (Spain)
Palarus bernardi deBeaumont, 1949 (Libya)
Palarus confusus R.Turner, 1911(Algeria, Libya)
Palarus dongalensis Klug, 1845 (Egypt, Iran, Israel, Saudi Arabia, Sudan,United Arab Emirates)
Palarus fulviventris Latreille, 1812 (Algeria,Egypt, Iran, Israel, Kazakhstan, Libya, Oman, Russia,Pakistan, Saudi Arabia, Syria, Tajikistan, Tunisia,Turkmenistan, United Arab Emirates, Uzbekistan)
Palarus hastatifrons R. Turner, 1919 (Egypt, Israel, Libya, Morocco)
Palarus histrio Spinola, 1839 (Iran, Israel, Jordan, North Africa,Kazakhstan, Saudi Arabia, United Arab Emirates)
Palarus laetus Klug,1845 (Benin, Burkina Faso, Djibouti, Ethiopia, Gambia,India, Iran, Israel, Jordan, Kuwait, Mali, Mauritania,Niger, North Africa, Oman, Pakistan, Qatar, SaudiArabia, Senegal, Sudan, Togo, United Arab Emirates)
Palarus rufipes Latreille, 1812 (Algeria, Egypt, Iran, Libya, Morocco,Tunisia)
Palarus saundersi Morice, 1897 (Israel, Kuwait, North Africa, SaudiArabia, Turkmenistan)
Palarus variegatus (Fabricius, 1781) (widespread in Palaearctic region)
Source:
http://www.waspweb.org/Apoidea/Crabroni ... /index.htm