An illustrated key to the species of Gasteruption Latreille (Hymenoptera, Gasteruptiidae) from Palaearctic China, with description of four new species Author Tan, Jiang-Li Shaanxi Key Laboratory for Animal Conservation / Key Laboratory of Resource Biology and Biotechnology in Western China, College of Life Sciences, Northwest University, 229 North Taibai Road, Xi'an, Shaanxi 710069, China tanjl@nwu.edu.cn Author Achterberg, Cornelis van https://orcid.org/0000-0002-6495-4853 State Key Laboratory of Rice Biology and Ministry of Agriculture / Key Lab of Agricultural Entomology, Institute of Insect Sciences, Zhejiang University, Hangzhou 310058, China Author Wu, Jia-Xuan https://orcid.org/0000-0002-4450-9664 Shaanxi Key Laboratory for Animal Conservation / Key Laboratory of Resource Biology and Biotechnology in Western China, College of Life Sciences, Northwest University, 229 North Taibai Road, Xi'an, Shaanxi 710069, China Author Wang, Hang Shaanxi Key Laboratory for Animal Conservation / Key Laboratory of Resource Biology and Biotechnology in Western China, College of Life Sciences, Northwest University, 229 North Taibai Road, Xi'an, Shaanxi 710069, China Author Zhang, Qi-Jing Shaanxi Key Laboratory for Animal Conservation / Key Laboratory of Resource Biology and Biotechnology in Western China, College of Life Sciences, Northwest University, 229 North Taibai Road, Xi'an, Shaanxi 710069, China text ZooKeys 2021 2021-05-19 1038 1 103 http://dx.doi.org/10.3897/zookeys.1038.64978 journal article http://dx.doi.org/10.3897/zookeys.1038.64978 1313-2970-1038-1 679CEE85732A43FEB171F3883C87E223 CEBC03B5B33D51B284FD8D3517F85D77 Gasteruption angulatum Zhao, van Achterberg & Xu, 2012 Figs 27-28 , 29-37 Gasteruption angulatum Zhao et al., 2012 : 19-22 (description). Additional material. 1 ♂ (NWUX), "NW China : Shaanxi , Xunyangba , Ningshaan , 33.55°N , 108.55E °, 20.v-23.vi.2016 , g[reen] Malaise trap , 1481 m alt., JL Tan & QQ Tan, NWUX" . Distribution. China (Henan, Hubei, Shaanxi, Zhejiang). Figures 27-28. Gasteruption angulatum Zhao, van Achterberg & Xu, male, Shaanxi 27 habitus lateral 28 apex of metasoma lateral. Notes. The male from Baolongyu (Qinling Mts, Shaanxi) illustrated by Tan et al. (2016) is the male of G. granulatum sp. nov. It differs from typical G. angulatum males because the middle lobe of the mesoscutum is less protruding and very regularly granulate (Figs 118 and 119 ) and the hind coxa is somewhat less slender (Fig. 120 ) than normal for G. angulatum . The male, listed above, was collected later and agrees better with the type series. This male has the middle lobe of the mesoscutum distinctly protuberant (Fig. 30 as in fig. 20 in Zhao et al. 2012 ) and very slender hind coxa (Figs 27 and 36 , as in fig. 23 l.c.). Figures 29-37. Gasteruption angulatum Zhao, van Achterberg & Xu, male, Shaanxi 29 head lateral 30 mesosoma lateral 31 mesosoma dorsal 32 wings 33 propleuron ventral 34 head anterior 35 head dorsal 36 hind leg 37 base of antenna.