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)