Passaloecus Shuckard, 1837

Passaloecus Shuckard, 1837: 188 . Type species: Pemphredon insignis Vander Linden, 1829 .

Xyloecus Shuckard, 1837: 25, junior homonym of Xyloecus Déjean, 1833 .

Diagnosis. Forewing with two recurrent veins and three discoidal cells; stigma small or moderate in size; episternal sulcus well developed; hypersternaulus present; labrum with apex entire, usually roundly produced; mandible with two or three apical teeth; female without pygidial plate; hindtibia without a series of spines along posterior margin; inner orbits nearly parallel or at least not converging markedly below; gena without long, erect setae ventrally; omaulus rarely present (Bohart and Menke, 1976).