Revision of the south Asian amisegine genus Cladobethylus Kieffer, 1922 (Hymenoptera, Chrysididae, Amiseginae) Author Kimsey, Lynn S. Bohart Museum of Entomology, Department of Entomology and Nematology, University of California, Davis, California, 95616, USA lskimsey@ucdavis.edu text Journal of Hymenoptera Research 2019 2019-06-28 70 41 64 http://dx.doi.org/10.3897/jhr.70.34206 journal article http://dx.doi.org/10.3897/jhr.70.34206 1314-2607-70-41 B8F3FB3E723749E79AA71AAC9EB4C787 043FFFE5D662FFB1FF8BFF88FF94FF84 3269963 Cladobethylus gilbus Kimsey Figs 20-25 Cladobethylus gilbus Kimsey 1986 :157. Holotype male; Malaysia: Pasoh Forest Res., Negri Sembilan (AEI). Diagnosis. Cladobethylus gilbus shares the nearly impunctate second metasomal tergum with Cl. darlingi , Cl. acehensis and Cl. densepunctatus . In males it can be distinguished from those species by the narrow malar space (less than 2.8 midocellar diameters), flagellomere I less than 4 x as long as broad, flagellomere II more than 2.5 x as long as broad, flagellomere XI 7 x as long as broad and postocular distance less than 1 MOD. Females have the basal three flagellar segments paler than the rest of the flagellum, very short flagellomeres I and II and malar space 4.5 midocellar diameters wide (shared with Cl. aquilus ). Male description. Body (Figs 21 , 22 ). Length 3.5-4.0 mm. Head . Scapal basin with narrow band of cross-ridges separated by smooth medial band; head venter without ovoid foveae along midline of gular area, gular area punctate; malar space 2.6 MOD long; head as wide as long; interocular distance 1.5 x eye width in front view; midocellus 1.4 MOD from ocular margin; ocelli arranged in a nearly equilateral triangle; hindocelli separated from ocular margin by 1 diameter; subantennal distance 0.6 MOD; clypeal apex truncate to slightly concave; flagellomere I 3.6 x as long as broad, setae length 0.4 x flagellomere breadth; flagellomere II 2.6 x as long as broad; flagellomere IX 7 x as long as broad; flagellomeres VIII-X slightly lobate submedially. Mesosoma . Pronotum 0.9 x as long as scutum; mesopleural punctures 0.2-0.5 puncture diameters apart; metapleuron with zone of cross ridging below hindwing base; propodeum laterally cross-ridged, posteromedially with subrectangular enclosure. Metasoma : terga I and II impunctate; terga III-V with basal band of dense, minute, contiguous punctures. Color : body black, except pronotum, scutum, scutellum and metanotal triangle with metallic blue highlights; antenna and legs including coxae yellow; wing membrane light brown tinted, with brown veins. Female description. Body (Figs 23 , 24 ). Length. 4.0-5.0 mm. Head . Frons punctures contiguous to 0.5 puncture diameters apart; scapal basin primarily smooth with short strip of cross-ridges on either side of broad medial stripe; head venter with ovoid fovea on either side of gular midline (Fig. 25 ), gular area punctate; clypeus subtruncate apically; subantennal distance 0.8 midocellar diameter; malar space 4.5 midocellar diameters long; head about as long as wide; midocellus 2 x midocellar diameters from ocular margin; ocelli arranged in nearly equilateral triangle; hindocelli separated from ocular margin by one diameter; flagellomere I as long as broad; flagellomere II 0.6 x as long as broad; flagellomere X twice as long as broad. Mesosoma . Pronotum about as long as scutum; mesopleuron with irregular scrobal sulcus, punctures contiguous to 0.5 puncture diameter apart; metapleuron smooth and impunctate; propodeum laterally polished, impunctate, posteromedially with subrectangular enclosure smooth but somewhat irregular. Metasoma . Tergum I impunctate; tergum II punctures 10 puncture diameters apart becoming slightly denser laterally; terga II-IV punctures 1-2 puncture diameters apart with impunctate rim. Color . Body black, except head and pronotum with faint metallic blue highlights; legs including coxae yellow; scape yellowish brown becoming darker ventrally; pedicel and flagellomeres I-III yellow, remaining flagellomeres brown dorsally becoming yellow ventrally; wing membrane brown-tinted, veins dark brown. Distribution. MALAYSIA: Negeri Sembilan , Pasoh Forest Res.; 106 males and 50 females were examined (AEI, BME). Males and females were found in nearly every month over a two-year period of Malaise trap collecting at this site (Fig. 20 ). Figures 20-25. Cladobethylus gilbus 20 graph of seasonal abundance of males and females in Malaysia 21, 22 males 23-25 females 21, 23 lateral view 22, 24 dorsal view 25 ventral view of head.