Mesoleptidea Viereck, 1912

Li, Tao, Li, Bin & Sun, Shu-Ping, 2024, Three new species of Mesoleptidea Viereck (Hymenoptera, Ichneumonidae) from China, Zootaxa 5397 (2), pp. 251-263 : 252

Mesoleptidea Viereck, 1912

Mesoleptidea Viereck, 1912: 176 . Type-species: Mesoleptus cingulatus Viereck.

Diagnosis. The diagnosis of the genus is modified from Townes (1970) and Sheng et al. (2020).

Fore wing length 4.8–9.3 mm. Clypeus 2.3–3.8 × as wide as long, shining, usually with fine punctures, apical margin truncate. Mandible large and long, with dense setae medially; lower tooth of mandible as long as or longer than upper tooth ( Figs 2 , 16 , 29 ). Dorsal end of epicnemial carina reaching anterior margin of mesopleuron. Areolet usually present, obliquely triangular, receiving 2m-cu closing its lower-posterior corner ( Figs 21 , 35 ). Hind wing vein 1-cu at least 2.0 × as long as cu-a. Propodeum without carinae, or hardly with weak indistinct carinae. First tergite long to very long and slender, spiracle located at its middle, latero-median carinae absent ( Figs 11 , 24 , 38 ). Setae on female hypopygium pointed obliquely backward ( Figs 14 , 27 , 41 ). Postero-lateral portion of metasoma usually white or yellowish white.

Figures

FIGURES 1–3. Mesoleptidea nigra Li & Sun, sp. nov., ♀, holotype (CBDPC). 1 Habitus, lateral view. 2 Head, anterior view. 3 Head, dorsal view. Scale bars: 1 = 2.0 mm; 2 = 0.3 mm; 3 = 0.2 mm.

FIGURES 15–17. Mesoleptidea nigricoxalis Li & Sun, sp. nov., ♀, holotype (CBDPC). 15 Habitus, lateral view. 16 Head, anterior view. 17 Head dorsal view. Scale bars: 15 = 2.0 mm; 16 = 0.3 mm; 17 = 0.2 mm.

FIGURES 28–30. Mesoleptidea ruficoxalis Li & Sun, sp. nov., ♀, holotype (CBDPC). 28 Habitus, lateral view. 29 Head, anterior view. 30 Head, dorsal view. Scale bars: 28 = 2.0 mm; 29–30 = 0.3 mm.

FIGURES 18–22. Mesoleptidea nigricoxalis Li & Sun, sp. nov., ♀, holotype (CBDPC). 18 Head, lateral view. 19 Mesosoma, lateral view. 20 Mesoscutum and scutellum, dorsal view. 21 Wings. 22 Hind tarsus. Scale bars: 18, 20 = 0.4 mm; 19, 22 = 0.5 mm; 21 = 1.0 mm.

FIGURES 31–36. Mesoleptidea ruficoxalis Li & Sun, sp. nov., ♀, holotype (CBDPC). 31 Head, lateral view. 32 Mesosoma, lateral view. 33 Mesoscutum and scutellum, dorsal view. 34 Wings. 35 Areolet. 36 Hind tarsus. Scale bars: 31–33 = 0.3 mm; 34 = 1.0 mm; 35 = 0.2 mm; 36 = 0.5 mm.

FIGURES 10–14. Mesoleptidea nigra Li & Sun, sp. nov., ♀, holotype (CBDPC). 10 Propodeum. 11 Tergite 1, dorsal view. 12 Tergite 1, lateral view. 13 Tergites 2–3, dorsal view. 14 Apical portion of metasoma, lateral view. Scale bars: 10–12, 14 = 0.3 mm; 13 = 0.5 mm.

FIGURES 23–27. Mesoleptidea nigricoxalis Li & Sun, sp. nov., ♀, holotype (CBDPC). 23 Propodeum. 24 Tergite 1, dorsal view. 25 Tergite 1, lateral view. 26 Tergites 2–3, dorsal view. 27 Apical portion of metasoma, lateral view. Scale bars: 23–25 = 0.3 mm; 26 = 0.5 mm; 27 = 0.2 mm.

FIGURES 37–41. Mesoleptidea ruficoxalis Li & Sun, sp. nov., ♀, holotype (CBDPC). 37 Propodeum. 38 Tergite 1, dorsal view. 39 Tergite 1, lateral view. 40 Tergite 2, dorsal view. 41 Apical portion of metasoma, lateral view. Scale bars: 37–40 = 0.3 mm; 41 = 0.2 mm.