Microstenus Szépligeti, 1916

Li, Tao, Sun, Shu-Ping & Sheng, Mao-Ling, 2020, First record of the genus Microstenus Szépligeti (Hymenoptera: Ichneumonidae Cryptinae) from China, with description of one new species and a key to world species, Zootaxa 4838 (4), pp. 594-600 : 595

Genus Microstenus Szépligeti, 1916

Microstenus Szépligeti, 1916: 287 . Type species: Microstenus canaliculatus Szépligeti, 1916 .

Diagnosis. Clypeus ( Fig. 3 ) wide and moderately convex, its apex weakly concave, without a median tooth. Hypostomal carina ( Fig. 6 ) absent apically. Sternaulus ( Fig. 9 ) evident, reaching middle coxa. Fore wing ( Fig. 7 ) with vein 1cu-a basad of 1/M approximately 0.5 to 0.6 × length of 1cu-a. Propodeum ( Fig. 11 ) evenly convex, smooth; lateromedian and lateral longitudinal carinae absent, pleural carina absent between anterior transverse carina and base of hind coxa; anterior and posterior transverse carinae strong; with a median and two sublateral longitudinal grooves between transverse carinae. Ovipositor sheath about 0.8 to 1.1 × as long as hind tibia. Lower valve ( Fig. 15 ) with a dorsal lobe enclosing upper valve, apical with oblique ridges; apical of upper valve with wavy ridges.

Figures

FIGURES 3–6. Microstenus rufithorax Sheng, Li & Sun, sp. nov., Holotype, but 4 of paratype. 3 head, anterior view 4 head, dorsal view 5 head, lateral view 6 head, apical of hypostomal carina (arrow), ventral view.

FIGURES 7–10. Microstenus rufithorax Sheng, Li & Sun, sp. nov., Holotype. 7 wings 8 mesoscutum and scutellum 9 mesosoma, lateral view 10 hind tarsus.

FIGURES 11–15. Microstenus rufithorax Sheng, Li & Sun, sp. nov., Holotype. 11 propodeum 12 metasoma, dorsal veiw 13 tergite I 14 tergites II-III 15 apical portion of ovipositor.