Agriotypus yangae, Tang & He & Chen, 2022

Tang, Pu, He, Jun-hua & Chen, Xue-xin, 2022, Five new species of Agriotypus Curtis, 1832 (Hymenoptera, Ichneumonidae, Agriotypinae) from China, Journal of Hymenoptera Research 90, pp. 1-22 : 1

Agriotypus yangae sp. nov.

Figs 6B , 8

Material examined.

Holotype. ♀, China, Shaanxi prov., Qinling, Tiantaishan , 34.2°N, 106.8°E, 1998.VI.9, Sun Changhai, No. 985922 (ZJUH).

Diagnosis.

This new species belongs to the Agriotypus himalensis species group, and it runs to A. chaoi Bennett in Bennett’s key (2001), but differs in ♀ scutellum funnel-shaped (the latter triangle-shaped); spine of scutellum black (the latter light brown apical half); mesoscutum punctate and pubescent (the latter sparsely pubescent and impunctate postero-medially). It differentiates from other new species proposed in this study by the combination characters: ♀ frons without a longitudinal carina; mesoscutum and scutellum completely black, without pale spots; mesoscutum pubescent; scutellum funnel-shaped; length of scutellum 1.8 × its basal width; spine of scutellum short, distinctly obliquely upward, rounded apically; T1 3.4 × its apical width.

Description.

Female. Body length 7.2 mm; fore wing length 6.0 mm.

Head. Head width equal to its median length. Antennae 26-segmented, 0.7 × length of forewing. Temple behind eyes roundly narrowed in dorsal view. Transverse diameter of eye 1.2 × temple in dorsal view. Frons convex medially, with shallow depression near middle ocelli, without longitudinal carina. Antennal scrobe deep, with a weak carina on its lateral margin parallel to inner orbit of eye. Ocelli medium-sized, in triangle with base equal to its sides. POL: OD: OOL = 15: 13: 22. Face distinctly convex medially with coarse rugosity and dense pubescence. Area between antennal socket with a glabrous tubercle. Clypeus nearly pentagonal, equal to its maximum width, roundly convex, more or less flat medially and rugose with punctuation in basal half; thin apically, finely strigate, slightly rounded on apical margin; summit of covexity of clypeus smoothly rounded in lateral view. Distance between dorsal tentorial pits 1.7 × length between a tentorial pit and eye. Malar space 1.6 × basal width of mandible. Occipital carina complete.

Mesosoma. Pronotum with long and strong epomia, portion dorsal to pronotal furrow curved sigmoidally; lateral of pronotum with more than seven fine carinae dorso-posteriorly. Mesoscutum punctate-rugose; notaulus deep, meeting in apical 0.2. Scutellum funnel-shaped, 1.8 × its basal width, 1.1 × length of propodeum; basal half of scutellum with lateral carinae and punctuation-rugosity, convex medially, lateral margin of scutellum paralleled in basal 2/3, tapering towards to apex in apical 1/3; in lateral view scutellum less roundly curved medially, distinctly obliquely upward, apex more or less rounded, produced 10° dorsoposteriorly. Mesopleuron and metapleuron finely punctuate and pubescent; ecepicnemial carina strong, only extending to ventral-anterior of mesopleuron; mesopleural sulcus complete; sternaulus strong. Propodeum punctate-rugose; lateromedian longitudinal carinae weakly convergent posteriorly; lateral longitudinal carinae straight, complete and paralleled with lateromedian longitudinal carinae.

Wings. Fore wing with vein 1cu-a distad of M&RS, abscissa of vein M between 2rs-m and 2cu-m 1.25 × 2rs-m; hind wing with vein CU & cu-a intercepted by distal abscissa of CU interrupted at lower 0.15.

Metasoma. T1 3.4 × its apical width, 1.65 × length of propodeum; T1 finely irregularly rugose-striate, transverse rugose before spiracles, spiracles situated in basal 0.3, widest at level of spiracles; lateromedian carinae and dorsolateral carinae complete and strong, reaching to apex. T2 with a pair of short carinae medially and a lateral carina before spiracle; T2 densely finely strigose. T3 and following tergite densely punctulate. Ovipositor sheath 0.8 × length of hind basitarsus.

Colour. Black. Apical of four tergites, sternites and ovipositor reddish brown. Leg black. Fore wing faintly infuscate, with three slightly fuscous longitudinal bands: basal band near cu-a; substigmal band below stigma and distal band in distal 0.25 of forewing; hind wing more or less hyaline.

Male. Unknown.

Host.

Unknown.

Distribution.

China (Shaanxi).

Etymology.

This species is named in honour of Dr Yang Lianfang, the famous entomologist who studied the taxonomy of Trichoptera in China.

Figures

Figure 6. habitus, lateral aspect. A Agriotypus taishunensis Tang, He & Chen, sp. nov. B Agriotypus yangae Tang He & Chen, sp. nov. Scale bar: 0.5 mm.

Figure 8. Agriotypus yangae Tang, He & Chen, sp. nov. A antennae and wings B mesosoma, lateral aspect C lateral of pronotum D mesosoma, dorsal aspect E T 1, dorsal aspect F head, front aspect G head, dorsal aspect H propodeum, dorsal aspect I metasoma (except T 1), dorsal aspect J ovipositor sheath, lateral aspect.