The genus Passaloecus Shuckard (Hymenoptera: Crabronidae) from China with four new species and two new records Author Bashir, Nawaz Haider Author Du, Shi-Jie Author Yue, Dan Author Li, Qiang Author Ma, Li text Zootaxa 2019 2019-07-08 4629 3 428 440 journal article 26275 10.11646/zootaxa.4629.3.10 5548ab92-335c-433e-9d2c-8af0ec8f8209 1175-5326 3270991 DF21032F-0A10-42D5-A892-75A83C4217D8 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 ).