Agriotypus dui, 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 dui sp. nov.

Figs 1 , 2

Material examined.

Holotype. ♀, China, Shaanxi prov., Qinling, Jialingjiang , 34.2°N, 106.8°E, 2000 m, 1998.VI.8, Du Yuzhou, No. 983341 (ZJUH) . Paratypes: China: 30♀♀ 4♂♂, same data with holotype, Nos. 983342-983375 (ZJUH, 2♀♀ No. 983368-983369 kept in TARI) ; 2♀♀ 4♂♂, same location and time data with holotype, Ma Yun, Nos. 982946-982947 (ZJUH) ; 4♀♀, Shaanxi prov., Qinling, Tiantaishan , 1998.VI.9, Sun Changhai, Nos. 985918-985921 (ZJUH) ; 2♀♀, Shaanxi prov., Zhouzhi, Houzhenzi , 1300 m, 1998.VI.2-3, Ma Yun, Nos. 981235-981236 (ZJUH) ; 1♀, Shaanxi prov., Foping, Longcaoping , 33.5°N, 107.9°E, 1998.VI.4, Ma Yun, No. 981985 (ZJUH) ; 4♀♀ 1♂, Shaanxi prov., Lantian, Tangyu , 34.1°N 109.3°E, 1998.VI.1, Ma Yun, Nos. 981217-981221 (ZJUH) ; 1♀, Shaanxi prov., Fengxian, Jialingjiang , 33.9°N, 106.5°E, 1998.VI.10, Sun Changhai, No. 985865 (ZJUH) ; 2♂♂, Shaanxi prov., Ningshan, Xunyangzhen , 33.3°N, 108.3°E, 1998.VI.6, Ma Yun, Nos. 982885-9828856 (ZJUH) ; 23♂♂, Shaanxi prov., Ningshan, Xunyangba , 2011.V.6, Chen Huayan, Nos. 201100192-201100214 (ZJUH) .

Diagnosis.

This new species belongs to the Agriotypus himalensis species group, and it runs to A. himalensis Mason in Bennett’s key (2001), but differs in ♂ lateral of pronotum without longitudinal rugosity dorso-posteriorly (the latter with longitudinal rugosity); ♀ length of spine of scutellum 0.9 × length of propodeum, produced 50° dorsoposteriorly (the latter 0.6-0.7 ×, more or less 35°); ♂ claspers in lateral view parallel dorso-ventrally, 1.2 × its apical width (the latter slightly enlarged, 2.4 × its apical width); legs black (the latter at least partly pale yellowish-brown). 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 mostly pubescent; scutellum long triangle-shaped, tapered apically; length of scutellum 2.5 × its basal width; spine of scutellum produced 50° dorsoposteriorly; length of T1 4.1-4.2 × apical width; ♂scutellum more or less parallel in basal 0.25; spine of scutellum produced 50° dorsoposteriorly; length of T1 6.5 × its apical width; paramere 1.2 × its apical width.

Description.

Female. Body length 6.2 mm; fore wing length 5.0 mm.

Head. Head width 1.0 × its median length. Antennae 29-segmented, 0.6 × length of forewing. Temple behind eyes slightly roundly narrowed in dorsal view. Transverse diameter of eye 1.2 × temple in dorsal view. Frons convex medially, 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 = 10: 12: 16. Face convex medially with coarse rugosity and dense pubescence. Area between antennal socket with a glabrous short longitudinal tubercle. Clypeus nearly pentagonal, 1.0 × its maximum width, roundly convex, flat 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 2.5 × length between a tentorial pit and eye. Malar space equal to basal width of mandible. Occipital carina fine, but complete.

Mesosoma. Pronotum with long and strong epomia, portion dorsal to pronotal furrow curved sigmoidally; lateral of pronotum with more than 10 fine carinae dorso-posteriorly. Mesoscutum densely punctulate; notaulus distinct, meeting in apical 0.2. Scutellum long triangle-shaped, 2.5 × its basal width, 1.4 × length of propodeum; basal half of scutellum with lateral carinae and punctuation-rugosity, convex medially, tapering towards to apex, spine-like apical half, smooth; in lateral view scutellum roundly curved medially, distinctly up curved, apex slightly obliquely truncate, produced 50° dorsoposteriorly. Mesopleuron and metapleuron finely punctuate and pubescent; ecepicnemial carina strong, extending to ventral-anterior of mesopleuron; mesopleural sulcus complete; sternaulus strong. Propodeum finely coriaceous-punctate; lateromedian longitudinal carinae weakly convergent posteriorly; lateral longitudinal carinae straight, complete and paralleled with lateromedian longitudinal carinae.

Wings. Fore wing with vein 1cu-a just distad of M&RS, abscissa of vein M between 2rs-m and 2cu-m 1.5 × 2rs-m; hind wing with vein CU & cu-a intercepted by distal abscissa of CU at lower 0.15.

Metasoma. T1 4.1 × its apical width, 1.9 × length of propodeum; T1 finely punctulate-reticulate, spiracles situated in basal 0.3, lateral margin of T1 behind spiracles parallel; lateromedian carinae and dorsolateral carinae complete and strong, reaching to apex. T2 convex on basomedian area, with fainly carina before spiracle. T2 and following tergite densely punctulate. Ovipositor sheath 0.9 × length of hind basitarsus.

Colour. Black. Pronotum ventrally, tip of spine of scutellum, apical of metasomal tergite reddish brown. Fore wing with three fuscous longitudinal bands: basal band on basal 0.1-0.5 of forewing, but with a wide hyaline spot occupying middle of cell R; substigmal band below stigma and distal band in distal 0.25 of forewing; hind wing only apical margin slightly infuscate.

Variation. Body length 5.6-6.6 mm; fore wing length 4.8-5.2 mm. Head width 1.1 × its median length. Antennae 30-segmented. Scutellum 2.8 × its basal width; Fore wing with 1cu-a slightly distad of M&RS, abscissa of vein M between 2rs-m and 2cu-m 1.0-2.0 × 2rs-m; T1 3.6-3.9 × its apical width, 1.6 × length of propodeum. Body color dark reddish brown.

Male. Body length 6.2-6.8 mm; fore wing length 5.4-5.7 mm. Antennae 39-40-segmented. POL: OD: OOL = 13: 12: 20. Lateral of pronotum without longitudinal rugosity dorso-posteriorly. Scutellum long triangle-shaped, 1.15-1.2 × length of propodeum; lateral carinae in basal 0.25 of scutellum more or less parallel, in apical 0.75 lineally narrowed; basal 0.45-0.5 of scutellum convex medially, with punctuation-rugosity; apical 0.5-0.55 of scutellum spine-like. lateromedian longitudinal carinae of propodeum more or less parallel, distinctly convergent in apical half. Fore wing with vein 1cu-a just distad of M&RS, abscissa of vein M between 2rs-m and 2cu-m slightly longer than 2rs-m; hind wing with CU & cu-a interrupted at lower 0.2. T1 6.5-6.8 × its apical width, 2.4-2.5 × length of propodeum; lateral margin of petiole more or less parallel. Paramere short, 1.2 × its apical width, apically bluntly round, more or less truncate. Fore wing faintly infuscate, only with more or less fuscous bands apically and below stigma. Otherwise similar to female.

Host.

Unknown.

Distribution.

China (Shaanxi).

Etymology.

This species is named in honour of Dr Du Yuzhou, the collector of the type specimen.

Figures

Figure 1. habitus, lateral aspect. A ♀, Agriotypus dui Tang, He & Chen, sp. nov. B ♂, Agriotypus dui Tang, He & Chen, sp. nov. Scale bar: 0.5 mm.

Figure 2. Agriotypus dui Tang, He & Chen, sp. nov. A ♀, antennae & wings B ♀, mesosoma, lateral aspect C ♀, mesosoma, dorsal aspect D ♀, lateral of pronotum E ♀, metasoma (except T 1), dorsal aspect F ♀, head, front aspect G ♀, head, dorsal aspect H ♀, propodeum, dorsal aspect I ♀, T 1, dorsal aspect J ♂, T 1, dorsal aspect K ♀, ovipositor sheath, lateral aspect L ♂, paramere, lateral aspect.