Parallobracon prolatus, Li & Achterberg & Chen, 2020

Li, Yang, Achterberg, Cornelis van & Chen, Xue-xin, 2020, A new genus and eight newly recorded genera of Braconinae Nees (Hymenoptera, Braconidae) from China, with descriptions of fourteen new species, ZooKeys 1038, pp. 105-178 : 105

Parallobracon prolatus sp. nov. Figures 27 , 28

Material examined.

Holotype: ♀, China, Zhejiang Prov., Hangzhou, 26.VI.1935, Zhu Ruzuo (ZJUH) . Paratype. 1♀ 1♂, China, Zhejiang Prov., Hangzhou, 17.VI.1934, Zhu Ruzuo (ZJUH) .

Diagnosis.

T II of the new species is similar to that of Cyanopterus oriens Belokobylskij, 2000, from Far East Russia (e.g., size and shape of medio-basal area and with pair of diverging depressions), but can be separated by having first discal cell of fore wing parallel-sided and vein 1-SR+M straight (widened basally and vein 1-SR+M weakly bent in C. oriens ), vein 1r-m of hind wing ca. 5 × longer than vein 2-SC+R (ca. equal in C. oriens ), vein 1-SR of fore wing distinctly oblique and pointing basad of vein cu-a (less oblique and pointing to vein cu-a in C. oriens ), second submarginal cell of fore wing widened distally (parallel-sided in C. oriens ) and apex of scapus strongly protruding ventrally (slightly protruding in C. oriens ).

Description.

Holotype, ♀, length of body 7.6 mm, of fore wing 7.7 mm, of ovipositor sheath 4.9 mm.

Head. Antenna incomplete, only remaining with scapus and pedicellus; malar suture with dense short setae (Fig. 28i ); clypeus height: inter-tentorial distance: tentorio-ocular distance = 3: 6: 7; clypeus with sparse short setae; eye weakly emarginated (Fig. 28g ); face weakly convex medially and weakly granulate, with some sparse punctures laterally (Fig. 28g ); eye height: shortest distance between eyes: head width = 17: 20: 40; frons largely smooth, weakly concave behind antennal sockets, with a strong median groove (Fig. 28h ); vertex smooth, but with some sparse short setae; minimum distance between posterior ocelli: minimum diameter of elliptical posterior ocellus: minimum distance between posterior ocellus and eye = 1: 1: 2; temples largely glabrous except for a few short setae, and subparallel behind eyes (Fig. 28h ).

Mesosoma. Length of mesosoma 1.9 × its height (Fig. 28c ); notauli impressed anteriorly half (Fig. 28d ); mesoscutum smooth, with a few sparse setae (Fig. 28d ); scutellar sulcus narrow, moderately deep, and with crenulae (Fig. 28d ); scutellum with sparse short setae posteriorly; metanotum strongly convex medially (Fig. 28d ); propodeum smooth, without longitudinal carinae or groove, with sparse setae medially, and with dense long setae laterally (Fig. 28d ).

Wings. Fore wing (Fig. 28a ): SR1: 3-SR: r = 21: 13: 5; 1-SR+M more or less straight, and 1.9 × longer than 1-M; 2-SR: 3-SR: r-m = 14: 26: 13; angle between 1-SR and C+SC+R ca. 75°; m-cu straight; 2-SR+M rather short; cu-a slightly postfurcal. Hind wing (Fig. 28b ): SC+R1: 2-SC+R: 1r-m = 17: 3: 13.

Legs. Length of fore femur: tibia: tarsus = 27: 31: 45; length of hind femur: tibia: basitarsus = 37: 53: 21; length of femur, tibia and basitarsus of hind leg 3.5, 6.6 and 5.3 × their maximum width, respectively (Fig. 28f ); hind tibial spurs 0.35 and 0.40 × as long as hind basitarsus.

Metasoma. Length of T I 1.1 × its apical width, median area convex, anteriorly half smooth and posteriorly half coarsely sculptured (Fig. 28j ); lateral grooves of T I sparsely crenulate (Fig. 28j ); T II largely smooth except medially (Fig. 28e ); triangular medio-basal area of T II large and smooth, with a few short oblique carinae connected laterally, and acute apically, but not attached with medio-longitudinal carina; antero-lateral areas of T II developed and smooth, anterior grooves moderately wide and sparsely crenulate (Fig. 28e ); second suture deep and crenulate, wide and weakly curved medially, narrow laterally (Fig. 28e ); T III with antero-lateral areas; T III-V with crenulate transverse subposterior groove (Fig. 28e ); T III-VII largely smooth, and with some spare short setae posteriorly; hypopygium acute apically, not reaching level of apex of metasoma; ovipositor sheath 0.6 × as long as fore wing.

Colour. Head and mesosoma largely reddish yellow (Fig. 27 ); antenna, eye, mandible apically, stemmaticum, propodeum medially and posteriorly, blackish brown (Fig. 28d, g, h ); fore legs (but claws dark brown) reddish yellow, middle and hind legs dark brown (Fig. 28f ); metasoma and ovipositor sheath black brown (Figs 27 , 28e ); wing membrane greyish brown, pterostigma and veins dark brown (Fig. 28a, b ).

Variation. Length of body of female 7.6-7.7 mm, of fore wing of female 7.7 mm, and of ovipositor sheath 4.2-4.9 mm; antenna of paratype female incomplete, with 30 antennomeres remaining; third antennomere 1.7 × longer than its maximum width, 1.2 and 1.3 × longer than fourth and fifth, respectively, the latter 1.3 × longer than wide; ovipositor sheath 0.5-0.6 × as long as fore wing.

Male. Length of body of male 7.8 mm, of fore wing of male 7.9 mm; antenna of male with 44 antennomeres; Length of mesosoma 1.7 × its height; fore wing vein cu-a interstitial; length of T I 1.0 × its apical width; other characters as in female.

Biology.

Unknown.

Distribution.

China (Zhejiang).

Etymology.

Named after the long and slender scapus which strong elongated ventrally: prolatus is Latin for elongated.

Figures

Figure 27. Parallobracon prolatus gen. et sp. nov., ♀, holotype, habitus, lateral view.

Figure 28. Parallobracon prolatus gen. et sp. nov., ♀, holotype (a-j), paratype (k) a fore wing b hind wing c mesosoma, lateral view d mesosoma, dorsal view e metasoma, dorsal view f hind leg, lateral view g head, anterior view h head, dorsal view i head, lateral view j first metasomal tergite, dorsal view k apex of ovipositor, lateral view.