A new species and a new record species of Megischus Brulle (Hymenoptera, Stephanidae) from Vietnam Author Ge, Si-Xun https://orcid.org/0000-0003-3769-1530 College of Forestry, Beijing Forestry University, Beijing 100083, China Author Ren, Li-Li College of Forestry, Beijing Forestry University, Beijing 100083, China lily_ren@bjfu.edu.cn 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 text Journal of Hymenoptera Research 2023 2023-09-11 96 723 734 http://dx.doi.org/10.3897/jhr.96.107502 journal article http://dx.doi.org/10.3897/jhr.96.107502 1314-2607-96-723 ECF92C76DDDD4FBDB379139EEC430CDE 22BAF12EF7AA5209AB8CB8B59C69216B Megischus kuafu Ge & Tan, 2021 Figs 16 , 17 Material examined. ♀ (BFU), Tuong Duong , Nghe An , Vietnam IX. 2022 , leg. Local collector . Diagnosis. Large size; head dark reddish brown, temples slightly bulging behind eyes; ocellar area transversely rugose; vertex reticulate-rugose medially, followed by weakly transverse rugae posteriorly almost reaching occipital carina; neck robust with incomplete carina before pronotal fold; scutellum almost glabrous; vein 1-M ca 5.9 x as long as vein 1-SR; hind tibia comparatively slender; hind basitarsus densely setose and parallel-sided, ventral length 7.4 x maximum width. Figure 18. Distribution map of Megischus species of Vietnam (map from: https://cn.bing.com/maps). Distribution. China (Guizhou); Vietnam. Biology. Collected in November. Host is unknown. Note. The specimen reported here is the second specimen of this species after the holotype. In terms of body size, specimen collected in Vietnam are smaller than the holotype (this specimen with length of body 36.5 mm, forewing 19 mm and ovipositor sheath 46 mm; while the holotype with length of body 39.1 mm, forewing 21.3 mm and ovipositor sheath 59 mm). In addition, the new specimen was collected in November (holotype in May), thus we speculate the species may be at least bivoltine.