Chorinaeus Holmgren, 1858

Ranjith, A. P. & Butcher, Buntika A., 2024, First record of the genus Chorinaeus Holmgren, 1858 (Hymenoptera: Ichneumonidae) from India and Thailand with the description of two new species, Zootaxa 5463 (2), pp. 283-290 : 284

Key to the Oriental species of Chorinaeus Holmgren, 1858

1. Propodeal spiracle more close to pleural carina; malar space 2.0–3.0 × as long as basal width of mandible.......................................................................................... Chorinaeus facialis Chao, 1981

– Propodeal spiracle more close to lateral carina ( Figs 2B , 4B ); malar space less than 2.0 × as long as basal width of mandible. ................................................................................................... 2

2. Face, clypeus and malar space yellow ( Figs 3B, D ).......................................................... 3

– Face brown or at least with brown patch ( Figs 1B, D ), clypeus and malar space brown ( Figs 1B, D ).................... 4

3. Antenna with 38 antennomeres; second metasomal tergite with short sublateral longitudinal carina basally; hind femur black; hind tibia black in apical half, remainder yellow............................ Chorinaeus ryukyuensis Kusigemati, 1987

– Antenna with 25 antennomeres ( Fig. 3A ); second metasomal tergite without sublateral longitudinal carina ( Figs 4B, C ); hind femur brown medially, yellow basally and apically ( Fig. 3A ); hind tibia completely yellow ( Fig. 3A ).................................................................................. Chorinaeus femiae Ranjith & Butcher sp. nov.

4. Lateral carina of scutellum very weak or obsolete; first flagellomere 2.5 × as long as wide; first metasomal tergite smooth without punctures.................................................... Chorinaeus aizanensis Kusigemati, 1967

– Lateral carina of scutellum strong and complete ( Figs 1F , 2A ); first flagellomere 2.8 × as long as wide; first metasomal tergite smooth anterior half, rugose-punctate posterior half ( Fig. 2D )............ Chorinaeus amrithae Ranjith & Butcher sp. nov.

Figures

FIGURE 1. Chorinaeus amrithae Ranjith & Butcher sp. nov., holotype, female A) habitus, lateral view; B) head, anterior view; C) head, dorsal view; D) head, antero-ventral view; E) head and mesosoma, lateral view; F) mesosoma, dorsal view.

FIGURE 2. Chorinaeus amrithae Ranjith & Butcher sp. nov., holotype, female A) scutellum and propodeum, dorsal view; B) propodeum and first metasomal tergite, dorso-lateral view; C) metasoma, lateral view; D) metasoma, dorsal view, E) fore wing.

FIGURE 3. Chorinaeus femiae Ranjith & Butcher sp. nov., holotype, female A) habitus, lateral view; B) head, anterior view; C) head, dorsal view; D) head, antero-ventral view; E) head and mesosoma, lateral view; F) mesosoma, dorsal view.

FIGURE 4. Chorinaeus femiae Ranjith & Butcher sp. nov., holotype, female A) scutellum and propodeum, dorsal view; B) propodeum and first metasomal tergite, dorso-lateral view; C) metasoma, lateral view; D) metasoma, dorsal view, E) fore wing.