Occipitotus Singh & van Achterberg 2022, gen. nov

Occipitotus Singh & van Achterberg gen. nov. (Figures 2–6) Type species: Occipitotus langpramensis Singh & van Achterberg sp. nov. Etymology. The generic name Occipitotus is masculine and refers to the complete occipital carina on the head; “occipit” stands for occipital carina and “totus” (Latin for “complete”). Diagnosis. Antenna with 22–30 flagellomeres (25–30 in female; 22–28 in male), longer than fore wing (Figs 2B, 4B), scapus small, subglobose, shorter ventrally than dorsally; occipital carina complete (Figs 3A, 4C), ventrally straight or slightly curved reaching base of mandible (rarely reduced near base of mandible) and raised into a flange; remaining widely separated from hypostomal carina (Figs 6A–E); hypoclypeal depression deep and small (Fig. 2E); clypeus slightly convex or flat, not protruding beyond the level of the face (Fig. 2A); malar suture obsolescent; pronope large and deep (Figs 3F, 4C); mesoscutum glabrous and shiny; notauli finely crenulate, terminating into rugose area posteriorly (Figs 3B, 4D); vein r of fore wing distinctly oblique and arising from basal 0.4–0.5 of pterostigma; first subdiscal cell of fore wing elongate (Figs 5B, 5D); fore wing vein 1-M of male widened, as wide as or slightly wider than length of cu-a (Fig. 5D); propodeum coarsely rugose-reticulate, with weak median carina anteriorly (Fig. 4D) or entire; dorsal carinae of metasomal tergite I not united medially and tergite coarsely rugosereticulate with (feeble) (Fig. 3C) or without (Fig. 3G) median carina; metasomal tergite II longitudinally striate (nearly) complete (Figs 3C, 4A) or anterior half striate (Fig. 5A); tergite II slightly longer than tergite III, feebly striate antero-laterally (Fig. 4A) or smooth and shiny (Fig. 5A); tergites IV–VI smooth and sparsely setose (Figs 3C, 4A); length of ovipositor sheath 0.5–0.7 times as long as first tergite (Figs 2B, 4A). Biology. Host unknown, but collected from horsetails, Equisetum sp. (Equisetaceae; Fig. 7B) along with an unidentified species of Coleoptera (Chrysomelidae; Fig. 7A); considering the biology of other species of the members of this subfamily Exothecinae, it is likely to be an ectoparasitoid of coleopterous larvae on Equisetum sp. Distribution. Oriental.