Taxonomic studies on Dasyproctus Lepeletier & Brullé (Hymenoptera: Crabronidae) from North Vietnam with description of two new species Author Pham, Phong Huy 0000-0001-5350-3865 Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, & Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam. phong. wasp @ gmail. com; https: // orcid. org / 0000 - 0001 - 5350 - 3865 phong.wasp@gmail.com text Zootaxa 2022 2022-09-15 5188 1 43 54 journal article 145796 10.11646/zootaxa.5188.1.2 3355f15e-548c-438e-a3bb-d898a59dff7e 1175-5326 7087337 A9418E18-930F-42F9-AE89-408EDC27470B Dasyproctus Lepeletier & Brullé, 1835 Dasyproctus Lepeletier & Brullé, 1835: 801 . Type species: Dasyproctus bipunctatus Lepeletier & Brullé, 1835 , by monotypy. Megapodium Dahlbom, 1844: 295 . Type species: Megapodium westermanni Dahlbom, 1844 , designated by Pate, 1937: 37. Bishamonis Tsuneki, 1983: 17 , as subgenus of Dasyproctus . Type species: Dasyproctus guadalensis Tsuneki, 1983 , by original designation and monotypy. Key to the Dasyproctus species from North Vietnam Females (Female uncollected for D. pentheri Leclercq ) 1. Anterior carina of pronotal collar laterally bending towards insertion of fore coxa ( Figs 9 , 15 , 28 , 50 ).................. 2 - Anterior carina of pronotal collar laterally curving towards pronotal lobe ( Figs 3 & 32 )............................. 5 2. T2 with large, round depression at base ( Fig. 51 ); free margin of clypeus slightly indented medially ( Fig. 49 ); frons without furrow above IOC ( Figs 49 & 52 ); metasoma petiolate ( Fig. 54 ); scape with small black spot on inner lateral side ( Fig. 52 ); T1 with apical width 2.6 × its basal width dorsally ( Fig. 51 ); T2‒T5 largely maculate ( Figs 51 & 54 ).. D. vietnamensis sp. nov. - T2 without depression at base; free margin of clypeus varied; frons with furrow above IOC ( Figs 8 , 14 , 26 ); metasoma subsessile ( Figs 11 , 17 , 27 ); scape with or without small black spot on inner lateral side ( Figs 7 , 14 , 26 ); T1 with apical width 2.2‒2.8 or 3.2 × its basal width dorsally ( Figs 11 , 17 , 27 ); T2‒T5 with maculation varied ( Figs 12 , 18 , 30 ).............. 3 3. Metasoma and legs reddish brown except yellow markings ( Figs 27 & 30 ); scape with large black spot on inner lateral side ( Fig. 26 ); fore tarsomere 1 with three short spines medially; T1 conspicuously extended apically, apical width 3.2 × its basal width dorsally; T2 bimaculate ( Fig. 27 )........................................................... D. longi sp. nov. - Metasoma and legs black except yellow markings ( Figs 11 & 17 ); scape without black spot dorsally ( Figs 8 & 14 ); fore tarsomere 1 with two short spines medially; T1 moderately extended apically, apical width 2.2‒2.8 × its basal width dorsally; T2 usually immaculate ( Figs 11, 12 , 17, 18 )................................................................ 4 4. Frons indistinctly, shallowly punctate, with narrow, shallow furrow above IOC ( Fig. 8 ); IOC distinct, moderately prominent over scapal basin ( Fig. 8 ); mesopleuron without yellow spot ( Fig. 9 ); scutellum often with yellow spots antero-laterally ( Fig. 10 ); body length more than 9 mm ...................................................... D. buddha (Cameron) - Frons distinctly punctate, with large, deep furrow above IOC ( Fig. 14 ); IOC indistinct, highly prominent over scapal basin ( Figs 13 & 14 ); mesopleuron with two yellow spots ( Fig. 15 ); scutellum with large yellow spot medially ( Fig. 16 ); body length less than 7 mm ......................................................................... D. idrieus (Cameron) 5. Free margin of clypeus very deeply indented medially, indention deeper than wide, without lateral denticle ( Fig. 1 )............................................................................................ D. agilis (F. Smith) - Free margin of clypeus moderately deeply indented medially, indention wider than deep, with lateral denticle ( Fig. 31 )..................................................................................... D. orientalis (Cameron) Males ( Male uncollected for D. buddha (Cameron) , D. agilis (F. Smith) , and D. longi sp. nov. ) 1. T2 with large, round depression at base ( Fig. 57 ); frons with shallow, narrow furrow above IOC ( Figs 55 & 58 ); T2‒T5 largely maculate ( Figs 57 & 61 ); T6 with large yellow band anteriorly ( Fig. 57 ); mandible reddish brown except black tooth and small yellow spot ( Fig. 55 )............................................................... D. vietnamensis sp. nov. - T2 without large, round depression at base ( Figs 22 , 38 , 46 ); frons without or with very deep furrow above IOC ( Figs 20 , 37 , 42 ); T2‒T5 with maculation varied ( Figs 24 , 41 , 48 ); T6 without or with moderately large yellow band anteriorly ( Figs 22 , 38 , 46 ); mandible wholly black ( Fig. 42 ) or black with large yellow spot ( Figs 19 & 37 )................................ 2 2. Frons without furrow above IOC ( Fig. 37 ); scape entirely yellow; T1 with very small bimaculae ( Fig. 41 ); T3 with small bimaculae ( Fig. 38 ) or immaculate; T5 and T6 with large yellow band ( Fig. 38 )................ D. orientalis (Cameron) - Frons with furrow above IOC ( Figs 19, 20 , 42, 45 ); scape with black spot on inner lateral side ( Figs 20 & 45 ); T1 without bimaculae ( Figs 24 & 48 ); T3 with large bimaculae; T5 and T6 without or with large interrupted yellow band ( Figs 22 & 46 ) ................................................................................................... 3 3. IOC very highly risen over scapal basin; frons with very large, deep furrow above IOC ( Figs 42 & 45 ); mandible black-brown; scapal dorsum brownish black except yellow apically ( Fig. 45 ); scutellum yellow antero-laterally ( Fig. 44 ); T2 bimaculate, T6 with large yellow band ( Figs 46 & 48 )................................................... D. pentheri Leclercq - IOC slightly risen over scapal basin; frons with moderately large, deep furrow above IOC ( Figs 19 & 20 ); mandible yellow basally ( Fig. 20 ); scapal dorsum yellow with small black spot near base ( Fig. 20 ); scutellum with large yellow band medially ( Fig. 21 ); T2 immaculate, T6 without yellow band ( Figs 22 & 24 )............................. D. idrieus (Cameron)