The genus Casinaria Holmgren, 1859 (Hymenoptera: Ichneumonidae, Campopleginae) from China Author Han, Yuan-Yuan 0000-0002-6438-7393 State Key Lab of Rice Biology, Zhejiang University, Hangzhou 310058, China. & yyhan 6 @ zju. edu. cn; https: // orcid. org / 0000 - 0002 - 6438 - 7393 yyhan6@zju.edu.cn Author Achterberg, Kees Van 0000-0002-6495-4853 State Key Lab of Rice Biology, Zhejiang University, Hangzhou 310058, China. & kees @ vanachterberg. org; https: // orcid. org / 0000 - 0002 - 6495 - 4853 kees@vanachterberg.org Author Chen, Xue-Xin 0000-0002-9109-8853 State Key Lab of Rice Biology, Zhejiang University, Hangzhou 310058, China. & Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Zhejiang University, Hangzhou 310058, China. Zhejiang Provincial Key Laboratory of Biology of Crop Pathogens and Insects, Zhejiang University, Hangzhou 310058, China. Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China. & xxchen @ zju. edu. cn; https: // orcid. org / 0000 - 0002 - 9109 - 8853 xxchen@zju.edu.cn text Zootaxa 2021 2021-05-21 4974 3 504 536 journal article 6210 10.11646/zootaxa.4974.3.3 24613fca-e696-4d64-aa28-68862191fa60 1175-5326 4777951 D6D1711D-EBD4-409C-8AC9-FA00B11DAB2E Key to species of Casinaria Holmgren from China 1. Nervellus not intercepted; propodeum usually without distinct carina; sometimes only the basal carina or irregular median longitudinal carina present; temple usually not swollen below, but receding dorsally immediately behind eyes; first metasomal tergite always longer than second tergite................................................................... 2 -. Nervellus intercepted; propodeum with distinct or indistinct median carina and usually other carinae also present; temple dorsally not receding, but sometimes ventrally receding; first tergite usually as long as second tergite.................... 19 2. First metasomal segment long and slender, largely cylindrical, longer than hind femur; hind femur long, slender and not widened medially; propodeum long, strongly apically produced and extending up to more than 0.75× length of hind coxa; propodeum strongly reticulate; frons with a median carina; scutellum flattened and laterally carinate; hind coxa rugulose........ 3 -. First metasomal segment comparatively stouter, either as long as or short than the hind femur; hind femur usually widened medially and stout; propodeum not strongly apically produced and not extending beyond middle of hind coxa; propodeal sculpture variable; frons without a median carina; scutellum a little convex, not laterally carinate; hind coxa weakly sculptured...... 4 3. Mesopleuron below subtegular ridge irregularly and coarsely wrinkled; fore trochanter and base of fore femur always blackish brown; face striate-rugose centrally.................................. C. pedunculata pedunculata (Szépligeti, 1908) -. Mesopleuron below subtegular ridge finely trans-striate; fore leg wholly yellowish brown with coxa darker; face rugose, not striate-rugose centrally.................................................. C. ajanta Maheshwary & Gupta, 1977 4. Frons and vertex finely rugose; clypeus rugose; eyes on the inner side weakly indented; third to fifth metasomal segments yellowish red; tegulae yellowish brown........................................... C. matsuyamensis (Uchida, 1928) -. Frons and vertex granulate to punctate; clypeus not rugose; eyes on the inner side indented to strongly indented and other characters not exactly same................................................................................. 5 5. Basal carina distinct and removed from base of propodeum, basal propodeal area trapezoid; speculum shiny; antenna with 39–41 flagellomeres..................................................................... C. remota sp. nov. -. Basal carina distinct or not distinct and not away from base of propodeum, basal propodeal area almost rectangle or absent; speculum shiny or mat; antenna usually with less than 39 flagellomeres.......................................... 6 6. Propodeum rugose-reticulate, median groove deep, strongly trans-striate; metapleuron rugulose to rugose-reticulate; first metasomal segment nearly as long as hind femur; basal transverse carina of propodeum distinct or indistinct; second recurrent vein emitted distinctly from middle or after middle of areolet...................................................... 7 -. Propodeum not rugose-reticulate, median groove shallow and not strongly sculptured; metapleuron mat to rugulose-punctate; first metasomal segment stouter and usually shorter than hind femur; basal transverse carina of propodeum indistinct; second recurrent vein emitted from middle of areolet.............................................................. 15 7. Malar space 0.8× as long as basal width of mandible; speculum polished; basal area of propodeum absent............................................................................................. C. albibasalis Uchida, 1928 -. Malar space less than 0.7× basal width of mandible; speculum usually mat; basal area of propodeum present............. 8 8. Metasoma wholly black, metapleuron rugulose-punctate, juxtacoxal carina distinct...................... C. xui sp. nov. -. Metasoma partly or largely yellowish brown to reddish brown, metapleuron mat to rugose-punctate, juxtacoxal carina absent to distinct............................................................................................. 9 9. Malar space 0.5–0.7× basal width of mandible; metasoma largely black with third and fourth or also fifth metasomal tergite reddish brown (except C. exiloides sp. nov. )............................................................... 10 -. Malar space 0.2–0.4× basal width of mandible; metasoma reddish beyond second tergite............................ 13 10. Face and clypeus rugose; mesopleuron granulate-punctate above................................. C. exiloides sp. nov. -. Face and clypeus rugulose to granulate-rugulose; mesopleuron granulate to granulate-rugulose above................. 11 11. Propodeum elongate, horizontal dorsally; hind femur reddish brown........... C. simillima Maheshwary & Gupta, 1977 -. Propodeum normal, slanted dorsally; hind femur blackish brown............................................... 12 12. Propodeum with a distinctly regular medio-longitudinal carina; interocellar distance 2.5× ocello-ocular distance; antenna with 30–33 flagellomeres; second recurrent vein emitted distinctly after middle of areolet; hind tibia white basally................................................................................................ C. albifunda sp. nov. -. Propodeum with a indistinctly irregular medio-longitudinal carina; interocellar distance 2.1× ocello-ocular distance; antenna with 39–40 flagellomeres; second recurrent vein emitted from middle of areolet or slightly behind middle; hind tibia yellowish brown basally and medially................................................... C. nigripes (Gravenhorst, 1829) 13. Face granulate-rugulose; speculum mat and with finely striate; metapleuron rugulose; propodeum with medio-longitudinal carina absent.......................................................................... C. artivultis sp. nov. -. Face rugose; speculum smooth and shiny; metapleuron rugose-punctate; propodeum with medio-longitudinal carina wavy. 14 14. Mid and hind trochanters, hind femur and tegulae black; malar space mat; mandible without a distinct lamella; second recurrent vein emitted from little beyond middle of areolet............................ C. buddha Maheshwary & Gupta, 1977 -. Mid and hind trochanters, hind femur and tegulae yellowish brown; malar space smooth and shiny; mandible with a distinct lamella; second recurrent vein emitted distinctly beyond middle of areolet............................ C. exilis sp. nov. 15. Malar space 0.3× basal width of mandible; face finely rugose-punctate; metapleuron granulate-punctate....................................................................................... C. tenuiventris (Gravenhorst, 1829) -. Malar space 0.5–0.75× basal width of mandible; face granulate-rugulose to rugose; metapleuron sparsely punctate to weakly rugose............................................................................................. 16 16. Hind femur yellowish brown; pronotum rugulose to rugulose-punctate posteriorly; scutellum rugulose to rugose......... 17 -. Hind femur blackish brown; pronotum rugose posteriorly; scutellum finely rugose-punctate.............................................................................................. C. arjuna Maheshwary & Gupta, 1977 17. Interocellar distance 1.1–1.3× ocello-ocular distance; mandible black, except teeth; tegulae brown; metasoma wholly black.......................................................................................... C. hei sp. nov. -. Interocellar distance 1.7–2.0× ocello-ocular distance; mandible yellow, except teeth; tegulae yellow; metasoma yellowish brown after second segment or with apical metasomal tergites black............................................ 18 18. Upper half of mesopleuron granulose; metapleuron with minute punctures; male genital claspers rod-like apically; interocellar distance 1.7× ocello-ocular distance; malar space 0.5× basal width of mandible..... C. formosana formosana Momoi, 1970 -. Upper half of mesopleuron granulate-rugulose; metapleuron weakly rugose; male genital claspers broad apically; interocellar distance 2.0× ocello-ocular distance; malar space 0.6× basal width of mandible... C. ashimae Maheshwary & Gupta, 1977 19. Interocellar distance longer than ocello-ocular distance; metasoma completely black; basal carina of propodeum close to its base; basal area of propodeum rectangular, short and broad; first abscissa of subdiscoideus 1.1–1.4× length of second abscissa; metasoma normal, segments not constricted; antenna short, stouter and widened subapically......................... 20 -. Interocellar distance equal to ocello-ocular distance; metasoma partly black and partly yellowish brown; basal carina distinctly removed from base of propodeum; basal area of propodeum trapezoidal, long and narrow; first abscissa of subdiscoideus 1.4–1.7× length of second abscissa; third to fifth metasomal segments constricted at joints (especially third segment); antenna long, thin and not widened subapically..................................... C. varuni Maheshwary & Gupta, 1977 20. Apex of clypeus truncate; malar space 0.4–0.5× basal width of mandible; interocellar distance 1.5× diameter of ocellus; basal carina, median and lateral longitudinal carina, costulae and apical transverse carina of propodeum all strong; nervellus intercepted at lower 0.1; first metasomal segment 1.5× second segment length, shorter than hind leg; metasoma thick cylindrical................................................................................... C. partolstoyi sp. nov. -. Apex of clypeus convex; malar space 0.2–0.3× basal width of mandible; interocellar distance 1.0–1.2× diameter of ocellus; at most basal carina of propodeum strong, others weakly developed; nervellus intercepted at lower 0.25; first metasomal segment equal to length of second segment and hind leg; metasoma thin cylindrical....................................... 21 21. Interocellar distance 1.4× ocello-ocular distance; medio-longitudinal carina distinct; thyridium drop-shaped; whole body black............................................................................... C. melasoma sp. nov. -. Interocellar distance 2.0× ocello-ocular distance; medio-longitudinal carina absent to indistinct; thyridium circular; only part of body black......................................................................................... 22 22. Hind femur and tibia black except a yellow subdorsal stripe on tibia; malar space 0.30× basal width of mandible............................................................................... C. leo leo Maheshwary & Gupta, 1977 -. Hind femur reddish brown, with apex blackish; hind tibia distinct banded subbasally and apically, yellowish centrally; malar space 0.25× basal width of mandible................................ C. leo rufipedalis Maheshwary & Gupta, 1977