Centistidea Rohwer 2023

Key to the Oriental species of the genus Centistidea Rohwer 1. Median carina of propodeum absent behind level of costulae (Figs 3F, 5F, 9F, 13F)................................. 2 - Median carina of propodeum present behind level of costulae and reaching posterior transverse carina of propodeum (Figs 7F, 11F)............................................................................................... 15 2. Pterostigma short triangular and without distinct slender triangular apex or vein R1; vein 1RS of fore wing distinctly developed and narrow, up to 0.4 × as long as vein 1M; first flagellomere 1.2–1.6 × as long as second flagellomere [China, Indonesia, Japan, Korea, Russia]............................................................. Centistidea irruptor (Papp, 1987) - Pterostigma elongate triangular and with distinct slender triangular apex or with distinct vein R1 (Figs 4C, 6D, 8C, 10C, 14C); vein 1RS of fore wing less developed and wider, 0.2–0.3 × as long as vein 1M (Figs 4C, 6D, 8C, 10C, 14C); first flagellomere 1.0–1.2 × as long as second flagellomere................................................................... 3 3. Dorsal length of eye 1.4 × temple; mesopleuron dark brown (Fig. 13D); propodeum crenulated near posterior transverse carina (Fig. 13F); vein R1 of fore wing distinctly vein-like and narrow (Fig. 14C) [India]........................................................................................... Centistidea yamu Ranjith & Priyadarsanan, sp. nov. - Dorsal length of eye 1.6–3.1 × temple; mesopleuron often yellow (Figs 3D, 5D, 7D, 9D); propodeum not crenulated near posterior transverse carina (Fig. 5F); vein R1 of fore wing triangular and not vein-like (Fig. 12C) or if vein-like then rather wide (Fig. 14C)........................................................................................... 4 4. Vein 1CUa of fore wing 0.4–0.7 × as long as vein 1Cub....................................................... 5 - Vein 1CUa of fore wing 0.8–1.2 × as long as vein 1Cub....................................................... 9 5. Dorsal length of eye more than 2.0 × temple................................................................ 6 - Dorsal length of eye less than 2.0 × temple................................................................. 7 6. Apex of antenna pale yellowish; scutellum with pits medio-posteriorly separated by 0.50 × diameter of pit; scutellar sulcus shallow without crenulations [India]........................ Centistidea mellapicalis Ranjith & van Achterberg, 2018 - Apex of antenna pale brown; scutellum with pits medio-posteriorly separated by carina; scutellar sulcus distinctly crenulated [India]................................................. Centistidea crenulator Ranjith & van Achterberg, 2018 7. OOL 4.0 × POL; face 1.2 × as wide as long; length of malar space 0.8 × basal width of mandible; first metasomal tergite 3.5 × as long as its maximum width [China]......................................... Centistidea zhaoi Chen & He, 1997 - OOL 1.9–2.4 × POL; face 1.6–1.8 × as wide as long; length of malar space 0.9–1.1 × basal width of mandible; first metasomal tergite 3.2–3.4 × as long as its maximum width.............................................................. 8 8. Scutellar pits separated by width of pit; propodeum yellow and smooth near midlongitudinal carina; dorsal part of metasomal tergite 1 & 2 yellow; hind basitarsus 3.4 × as long as wide [India].... Centistidea lineator Ranjith & van Achterberg, 2018 - Scutellar pits separated by a carina; propodeum brown and with striae near midlongitudinal carina; dorsal part of metasomal tergite 1 & 2 brown; hind basitarsus 4.1 × as long as wide [India]...................................................................................................... Centistidea scutellator Ranjith & van Achterberg, 2018 9. Scutellar pits separated by a thin carina (Figs 3F, 13F)....................................................... 10 - Scutellar pits separated by at least 0.25 × diameter of pit (Figs 5F, 9F).......................................... 12 10. Scutellum with oval pits medio-posteriorly; propodeum smooth near midlongitudinal carina; first flagellomere as long as second [China, Japan, Korea, Russia, Vietnam]..................................... Centistidea mogra (Papp, 1987) - Scutellum with subrectangular pits medio-posteriorly (Fig. 3F); propodeum sculptured near midlongitudinal carina (Fig. 3F); first flagellomere longer than second..................................................................... 11 11. OOL 4.2 × POL; first flagellomere 5.8 × as long as wide; mesoscutum and propodeum yellow; hind tibia 8.8 × as long as wide; first metasomal tergite 3.0 × as long as its maximum width [India]... Centistidea rugator Ranjith & van Achterberg, 2018 - OOL 2.5 × POL; first flagellomere 5.3 × as long as wide; mesoscutum and propodeum mostly brown (Figs 3E, F); hind tibia 6.8 × as long as wide; first metasomal tergite 3.5 × as long as its maximum width [Sri Lanka]................................................................................ Centistidea burwelli Ranjith & Priyadarsanan, sp. nov. 12. First metasomal tergite 2.4 × as long as its maximum width................................................... 13 - First metasomal tergite 2.7–3.2 × as long as its maximum width............................................... 14 13. Pterostigma brown; OOL 2.2 × POL; length of malar space 1.5 × basal width of mandible; clypeus 2.2 × wider ventrally than medially high; hind basitarsus 4.5 × as long as wide........... Centistidea procarinator Ranjith & van Achterberg, 2018 - Pterostigma yellow (Fig. 6D); OOL 1.8 × POL; length of malar space 1.1 × basal width of mandible; clypeus 1.5 × wider ventrally than medially high; hind basitarsus 4.0 × as long as wide [India].......................................................................................... Centistidea flavostigmata Ranjith & Priyadarsanan, sp. nov. 14. Mesoscutum and propodeum brown; fore wing vein 1CUa 0.9 × as long as 1Cub; OOL 2.0 × POL; hind basitarsus 4.5 × as long as wide [India]............................................... Centistidea cosmopteryxi Ahmad & Pandey, 2019 - Mesoscutum and propodeum yellow (Figs 9E, F); fore wing vein 1CUa 1.2 × as long as 1Cub; OOL 2.5 × POL; hind basitarsus 3.6 × as long as wide [Sri Lanka].............................. Centistidea lanka Ranjith & Priyadarsanan, sp. nov. 15. Junction of propodeal costula pointed posteriorly (Fig. 7F)................................................... 16 - Junction of propodeal costula pointed anteriorly (Fig. 11F)................................................... 17 16. Midlongitudinal carina of propodeum not forked anteriorly; pterostigma brown; vein R1 of fore wing indistinct; first metasomal tergite 4.0 × as long as its maximum width; OOL 4.0 × POL [India]..... Centistidea acrocercopsi Ahmad & Pandey, 2019 - Midlongitudinal carina of propodeum forked anteriorly (Fig. 7F); pterostigma yellow (Fig. 8C); vein R1 of fore wing distinctly vein-like and wide (Fig. 8C); first metasomal tergite 4.5 × as long as its maximum width; OOL 2.4 × POL [India].................................................................. Centistidea furca Ranjith & Priyadarsanan, sp. nov. 17. Antero-dorsal part of propodeum about 1.5 × as long as metanotum medially; length of eye 1.2 × as long as temple in dorsal view; fore wing vein 1CUa of fore wing slender; first flagellomere as long as second [China]............................................................................................... Centistidea immitis Wu & Chen, 2000 - Antero-dorsal part of propodeum about 2.5–3.0 × as long as metanotum medially; length of eye 1.8–2.0 × as long as temple in dorsal view; fore wing vein 1CUa of fore wing thickened (Fig. 12C); first flagellomere 1.3–1.6 × as long as second...... 18 18. Medio-posterior pits on scutellum circular and without crenulations; clypeus brown, 2.0 × as wide as medially long; metasomal tergite 3 brown; first flagellomere 6.5 × as long as wide [China-Taiwan]....... Centistidea taiwanica (Papp & Chou, 1996) - Medio-posterior pits on scutellum oval and crenulated (Fig. 11F); clypeus yellow (Fig. 11B), 2.6 × as wide as medially long; metasomal tergite 3 yellow (Fig. 12B); first flagellomere 5.5 × as long as wide [India].................................................................................. Centistidea nyeringensis Ranjith & Priyadarsanan, sp. nov.