A new species of Trychosis Foerster (Hymenoptera, Ichneumonidae, Cryptinae), with a key to the species known from China Author Ren, Ying-Jie https://orcid.org/0000-0002-8472-8992 Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, Heilongjiang, China Author Wang, Kai Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, Heilongjiang, China Author Zhou, Chun-Lai Hongxinglong Branch, Heilongjiang Naolihe National Nature Reserve Administration, Shuangyashan 155100, Heilongjiang, China Author Cui, Xing-Bo Hongxinglong Branch, Heilongjiang Naolihe National Nature Reserve Administration, Shuangyashan 155100, Heilongjiang, China Author Wang, Guang-Xin Hongxinglong Branch, Heilongjiang Naolihe National Nature Reserve Administration, Shuangyashan 155100, Heilongjiang, China Author Liu, Man-Hong Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, Heilongjiang, China Author Ye, Sheng-xin Natural Resources Rights Survey and Monitoring Institute of Heilongjiang Province, Harbin 150080, Heilongjiang, China Author Meng, Zhao-Jun Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, Heilongjiang, China 392360061@qq.com text ZooKeys 2023 2023-06-14 1167 49 56 http://dx.doi.org/10.3897/zookeys.1167.104105 journal article http://dx.doi.org/10.3897/zookeys.1167.104105 1313-2970-1167-49 D85CEB0FFD534B488F9C08BCB79E82DE 05CA0312F1295D06AFA5E52F23A1F46D Trychosis Foerster , 1869 Trychosis Foerster , 1869. Verhandlungen des Naturhistorischen Vereins der Preussischen Rheinlande und Westfalens 25(1868): 187. Type species: Cryptus ambigua Tschek. Diagnosis. Fore wing length 3.2-8.8 mm. Clypeus moderately to strongly convex, with anterior margin almost truncate to strongly convex forward, without tooth. Mesoscutum very short, with dense punctures. Epomia usually present and strong. Epicnemial carina reaching center of mesopleuron close to its anterior margin. Propodeum strongly oblique, anterior and posterior transverse carinae present. Propodeal spiracle almost circular. Areolet usually parallel laterally. Hind wing with vein 1-cu as long as or longer than cu-a. Tergite 1 long, 0.5-0.6 x as long as mesosoma. Ovipositor thin, compressed, with nodus.