Integrated taxonomy unveils new species of Trigonalyidae (Insecta, Hymenoptera) from Yunnan, China Author Zhang, Bing-Lan School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China Author Yan, Cheng-Jin Wenzhou Vocational School of Science and Technology, Wenzhou 325300, China & Wencheng Modern Agriculture and Health Industry Research Institute, Wenzhou 325300, China ycj0685@163.com Author van Achterberg, Cornelis https://orcid.org/0000-0002-6495-4853 State Key Laboratory of Rice Biology and Ministry of Agriculture, Hangzhou 310058, China & Key Lab of Agricultural Entomology, Institute of Insect Sciences, Zhejiang University, Hangzhou 310058, China Author Peng, Yan-Qiong CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, China Author Chen, Hua-Yan https://orcid.org/0000-0002-0382-1635 Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China huayanc@scbg.ac.cn text Journal of Hymenoptera Research 2022 2022-04-29 90 101 128 http://dx.doi.org/10.3897/jhr.90.80150 journal article http://dx.doi.org/10.3897/jhr.90.80150 1314-2607-90-101 13EC4891F1244E77BC22F6978445DAE7 CB21DA90B0FB5683B712B7717D201AD6 6508930 Lycogaster Shuckard, 1841 Figs 4 , 5 , 6 Lycogaster Shuckard, 1841: 121; Weinstein and Austin 1991 : 414; Carmean and Kimsey 1998 : 61. Type species (by original designation): Lycogaster pullatus Shuckard, 1841. Diagnosis. Body length 5.1-15.0 mm; antenna with 21-24 segments, of female widened medially (but hardly so in L. angustula ); antenna of male without tyloids; supra-antennal elevations small, without depression dorsally; vertex convex and shiny; mandibular condyli close to level of eyes; apical segment of labial palp widened and obtuse, more or less triangular; metanotum smooth, shiny and weakly convex; triangular dorso-apical part of hind trochanter separated by an oblique groove; fore trochanter subparallel-sided and distinctly longer than hind trochanter; hind tarsus slightly or not modified; basal half of third metasomal sternite with a posteriorly steep, smooth and complete transverse ledge (may be partly hidden under second sternite and rather low in L. violaceipennis ); second sternite with pair of small triangular teeth on apical protuberance (but only with pair of lobe-shaped flaps in male of L. violaceipennis ; with a strong lobe-shaped protuberance medio-apically in female of L. umbonata sp. nov., Figs 4A , 5E, F ) and sometimes absent; epipleura of tergites laterally strongly pigmented; fifth sternite of female distinctly emarginate medio-posteriorly. Figure 4. Lycogaster umbonata Chen & van Achterberg, sp. nov., holotype, female (En-419021) A habitus, lateral aspect B head, anterior aspect C head, dorsal aspect. Figure 5. Lycogaster umbonata Chen & van Achterberg, sp. nov., holotype, female (En-419021) A wings B mesosoma, dorsal aspect C mesosoma, lateral aspect D metasoma, dorsal aspect E metasoma, lateral aspect F metasoma, ventral aspect. Biology. In the New World reared as hyperparasitoid of Ichneumonidae in caterpillars of the families Saturniidae and Notodontidae ( Carmean and Kimsey 1998 ). Distribution. China. Before this study, four species of this genus have been described from China, with only one species recorded from Yunnan. We describe here the second species new to science from Yunnan.