The genus Passaloecus Shuckard (Hymenoptera: Crabronidae) from China with four new species and two new records

Four new species of genus Passaloecus Shuckard, (Crabronidae: Pemphredoninae: Pemphredonini) from China are described, namely P. bisulcatus Bashir & Ma, sp. nov. , P. profundesulcatus Bashir & Ma, sp. nov. , P. tuberangustus Bashir & Ma, sp. nov. , and P. tuberculiformis Bashir & Ma, sp. nov . In addition, eight Palearctic species are reported, of which P. turanicus Gussakovskij and P. turionum Dahlbom are first records for China. A key to the species of Passaloecus from China is provided.