Key to Ooctonus Haliday (Hymenoptera: Mymaridae) in China, with one new species and three new country records Author Aishan, Zhulidezi College of Life Science and Technology, Xinjiang University, Urumqi, Xinjiang, P. R. China. & Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, Urumqi, P. R. China Author Triapitsyn, Serguei V. 0000-0002-5086-7847 Entomology Research Museum, Department of Entomology, University of California, Riverside, California, 92521, USA. serguei. triapitsyn @ ucr. edu; https: // orcid. org / 0000 - 0002 - 5086 - 7847 serguei.triapitsyn@ucr.edu Author Zhu, Chao-Dong 0000-0002-9347-3178 Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, 1 Beichen West Road, Chaoyang District, Beijing, 100101, P. R. China. zhucd @ ioz. ac. cn; https: // orcid. org / 0000 - 0002 - 9347 - 3178 & State Key Laboratory of Integrated Pest Management, Institute of Zoology, Chinese Academy of Sciences, 1 Beichen West Road, Chaoyang District, Beijing, 100101, P. R. China zhucd@ioz.ac.cn Author Hu, Hong-Ying College of Life Science and Technology, Xinjiang University, Urumqi, Xinjiang, P. R. China. & Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, Urumqi, P. R. China text Zootaxa 2022 2022-06-23 5155 4 581 588 journal article 80410 10.11646/zootaxa.5155.4.7 1d896240-e838-4e07-92ed-15eb67f71f9f 1175-5326 6691760 8970F2CC-0411-4EA8-A5D6-5C7B62964F39 Key to the 18 known species of Ooctonus from China based on females 1 Metanotum and propodeum ( Fig. 7 ; Triapitsyn 2010 , p. 19, fig. 11) with reticulate sculpture........ O. hemipterus Haliday - Metanotum and propodeum without reticulate sculpture....................................................... 2 2 Midlobe of mesoscutum with narrow median groove ( Fig. 22 ; Huber 2010 , p. 84, fig. 103)........................... 3 - Midlobe of mesoscutum without median groove ( Figs 2 , 11 , 15 )................................................ 9 3 Propodeum without median areole (Jin 2019 & Li 2020, p. 3, fig. 1e)............................ O. exsertus Jin & Li - Propodeum with median areole ( Fig. 22 )................................................................... 4 4 Body almost entirely black, except eyes and ocelli dirty pink and gaster dark brown to black; ovipositor not exserted beyond apex of gaster...................................................................... O. sinensis Subba Rao - Body brown to dark brown; ovipositor slightly or notably exserted beyond apex of gaster............................ 5 5 F5 and F6 without mps................................................................. O. saturn Triapitsyn - F5 and F6 with 1 or 2 mps.............................................................................. 6 6 Funicle with F2 the longest and F8 the shortest; ovipositor exserted beyond apex of gaster by at least 0.18× its own length..................................................................................... O. kokozai Triapitsyn - Funicle with all segments more or less subequal in length; ovipositor exserted beyond apex of gaster by at most 0.1× its own length.............................................................................................. 7 7 Propodeum with lateral carina split anteriorly ( Fig. 22 ), forming a broadly Y-shaped carina not extending to anterior margin on either side............................................................................. O. orientalis Doutt – Propodeum with lateral carinae entire and extending to or almost to anterior margin................................ 8 8 F6 with 2 mps; midlobe of mesoscutum ( Fig. 25 ) with narrow median groove extending from posterior margin anteriorly about 0.25× length........................................................................ O. spartak Triapitsyn - F6 without mps; midlobe of mesoscutum ( Fig. 11 ) with median groove extending anteriorly almost 0.7× length............................................................................................... O. lapen Triapitsyn 9 Clava with 8 mps.................................................................................... 10 - Clava with 7 mps.................................................................................... 12 10 F4 without mps; ovipositor ( Fig. 4 ) at most occupying about 0.4× length of gaster.................................................................................................... O. innermongolicus Aishan & Hu , sp. nov. - F4 with 1 or, usually 2 mps; ovipositor occupying at least about 0.9× length of gaster.............................. 11 11 Clava 2.8–3.1× as long as wide ( Fig. 13 ); petiole 0.9–1.1× as long as metacoxa; ovipositor ( Fig. 16 ) extending beyond apex of gaster by 0.12× its own length and 1.4× length of metatibia................................. O. lokomotiv Triapitsyn – Clava 3.3–3.6× as long as wide; petiole 1.2–1.4× as long as metacoxa; ovipositor extending beyond apex of gaster by less than 0.1× its own length and 1.0–1.2× length of metatibia.......................................... O. insignis Haliday 12 Propodeum with median carina incomplete, almost absent or at least not extending to anterior margin of propodeum.......................................................................................... O. sublaevis Foerster - Propodeum with median carina extending to anterior margin of propodeum...................................... 13 13 Funicle with F1–F6 lacking mps......................................................... O. vulgatus Haliday - Funicle with at least 1 mps on F4, F5 or F6................................................................ 14 14 Metacoxa dark brown or black, almost same color as mesosoma; midlobe of mesoscutum without a median groove or at most with a very short median groove..................................................... O. himalayus Subba Rao - Metacoxa yellowish or brown, different in color from mesosoma; extent of median groove on mid lobe of mesoscutum variable............................................................................................... 15 15 F6 without mps......................................................................... O. notatus Walker - F6 with 1 or 2 mps................................................................................... 16 16 F4 without mps.......................................................................... O. us Triapitsyn - F4 with 2 mps....................................................................................... 17 17 Propodeum with median areole separated from metascutellum by longitudinal median carina, and lateral carina with an anterior bifurcation; ovipositor at least 1.1× as long as metatibia......................................... O. novickyi Soyka - Propodeum with median areole abutting metascutellum, the median carina replaced by two submedian carinae forming inner margin of dorsolateral areoles, and lateral carina without an anterior bifurcation; ovipositor at most 0.9× as long as metatibia.................................................................................. O. huberi Bai, Jin & Li