A review of the subgenera Arichelonus, Megachelonus and Scabrichelonus of the genus Chelonus Panzer (Braconidae: Cheloninae) with description of five new species from China Author Zhou, Jin-Jin 0000-0002-1563-8408 Hainan Institute, Zhejiang University, Sanya 572000, China & Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China & auzhou @ zju. edu. cn; https: // orcid. org / 0000 - 0002 - 1563 - 8408 auzhou@zju.edu.cn Author Achterberg, Kees Van 0000-0002-6495-4853 Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China & kees @ vanachterberg. org; https: // orcid. org / 0000 - 0002 - 6495 - 4853 kees@vanachterberg.org Author Tang, Pu Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China & State Key Lab of Rice Biology, Zhejiang University, Hangzhou 310058, China & Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Zhejiang University, Hangzhou 310058, China Zhejiang Provincial Key Laboratory of Biology of Crop Pathogens and Insects, Zhejiang University, Hangzhou 310058, China Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China Author Chen, Xue-Xin 0000-0002-9109-8853 Hainan Institute, Zhejiang University, Sanya 572000, China & Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China & State Key Lab of Rice Biology, Zhejiang University, Hangzhou 310058, China & Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Zhejiang University, Hangzhou 310058, China Zhejiang Provincial Key Laboratory of Biology of Crop Pathogens and Insects, Zhejiang University, Hangzhou 310058, China Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China & xxchen @ zju. edu. cn; https: // orcid. org / 0000 - 0002 - 9109 - 8853 xxchen@zju.edu.cn text Zootaxa 2022 2022-07-18 5165 4 527 547 journal article 99513 10.11646/zootaxa.5165.4.5 bd8c5821-b532-4539-af24-856a62ba7b27 1175-5326 6854024 F108240E-FE0B-4832-96CB-F0540CB338E3 Subgenus Arichelonus Viereck, 1913 Chelonus ( Arichelonus ) Viereck, 1913: 641 . Type-species: Chelonus aculeatus Ashmead, 1890 . Arichelonus : De Saeger, 1948: 125 (as syn. of Chelonus Panzer ). Diagnosis. Head transverse ( Figs 2H , 4G ); antenna slender, filiform ( Figs 2I , 4I ); face and vertex behind ocelli smooth to densely granulate, clypeus flat and densely punctate ( Figs 2G , 4F ); eyes setose ( Figs 2J , 4H ); mesoscutum evenly convex, transverse suture distinct; scutellar suture comparatively deep; propodeum coarsely reticulate-rugose with transversal carina ( Figs 2C , 4C ); metasomal carapace with the straight elongate apex ( Figs 2D , 4D ). Biology. Unknown. Distribution. Oriental. Key to species of subgenus Arichelonus 1 Apex of metasomal carapace with a semi-round and semi-hyaline lamella ( Fig. 4D ). Zhejiang ( China )................................................................................................. C. ( A. ) kenosetrus sp. nov. - Apex of metasomal carapace without such lamella........................................................... 2 2 Body length less than 4.0 mm; length of antenna distinctly less than body length in female........................... 3 - Body length 5.0–9.0 mm; antenna nearly as long as body length in female........................................ 4 3 Antennomeres of female 18 ( Fig. 2I ), slender. Zhejiang ( China )............................................................................................................................... C. ( A. ) allokotosus sp. nov. - Antennomeres of female 27, robust. USA ........................................ C. ( A. ) aculeatus Ashmead, 1890 4 Head weakly widened behind eyes in dorsal view; hind femur 4.0 × longer than wide; mesosoma black. Kazakhstan .................................................................................... C. ( A. ) sternalis Tobias, 1964 - Head subparallel-sided behind eyes in dorsal view; hind femur 3.3–3.8 × longer than wide; mesosoma frequently more or less reddish. Europe and Central Asia................................................... C. ( A. ) olgae Kokujev, 1895