Streblocera (Streblocera) huuliena Mai & Long & Hiep & Hoa & Duong 2025

Streblocera (Streblocera) huuliena Long & PQMai, sp. nov. Figures 13, 14, 21 Type material. Holotype, ♀, labelled “Euph. 393 ” (IEBR), NE Vietnam: Lang Son, Huu Lung, Huu Lien NR, forest, MT, 21°38’43’’N 106°21’41’E, 187 m, 25.ii.2024, PQ Mai, TD Duong. Paratypes, 2♀, labelled “Euph. 398 ”, “Euph. 399 ”, (IEBR), NE Vietnam: Lang Son, Huu Lien NR, forest, MT, 21°39’4’’N 106°21’51’E, 200 m, 15.ii.2024, PQ Mai, TD Duong; paratype, 1♀, labelled “Euph. 395 ” (IEBR), ibid., but 25.iii.2024, PQ Mai, TD Duong. Diagnosis. Small wasp, S. (S.) huuliena, sp. nov. is relatively close to S. (S.) curvata Belokobylskij, from Nepal but differs from the latter by having: 1) First metasomal tergite 1.6 × as long as its apical width [vs 2.0 × in S. (S.) curvata] and apical width of first metasomal tergite 2.5 × as long as its minimum width [vs 3.0 × in S. (S.) curvata]; 2) Vein r of fore wing arising from middle of pterostigma (vs far behind middle of pterostigma see Fig. 16 in Belokobylskij 2000a) and vein 1-R1 very short, 0.3 × as long as pterostigma; and 3) Antenna with 14 antennomeres [vs 17–18 antennomeres in S. (S.) curvata]. The new species, S. (S.) huuliena, sp. nov., is also similar to S. (S.) necurvata, sp. nov., differences between them were given in the key; antenna with 14 antennomeres. Description. Holotype, ♀; body length 1.9 mm, fore wing length 1.8 mm, ovipositor 0.4 mm (Fig. 13). Head. Antenna with 14 antennomeres; length of scapus 8.7 × its maximum width (Fig. 14H), and 1.7 × of head height; first flagellomere curved, 6.7 × as long as its median width, and 2.5 × the second flagellomere; first flagellomere 0.4 × scapus; first flagellomere curved, with apical hook, and 2.6 × second flagellomere; second-seventh flagellomeres serrate ventrally; in dorsal view, occipital carina incomplete medio-dorsally (Fig. 14A), width of head 1.5 × its median length, and 1.4 × width of mesoscutum (without tegulae); temple roundly narrowed behind eye; length of eye 2.4 × as long as temple; ocelli small, POL: OD: OOL= 3.5: 1.5: 5.0 (Fig. 14A); eye 2.1 × as high as broad; in lateral view, transverse diameter of eye 1.4 × temple (Fig. 14C); in frontal view, diameter of antennal socket as long as distance between sockets; face width 1.1 × length of face and clypeus combined, and 1.4 × height of eye; ventral margin of clypeus weakly curved medially; malar space 1.3 × as long as basal width of mandible, and 0.4 × as long as eye height; distance between tentorial pits 1.25 × distance from pit to eye margin; face and clypeus coriaceous (Fig. 14B); frons slightly depressed laterally, smooth, with fine median striae; temple and vertex highly polished (Figs 14A, C). Mesosoma. In lateral view, length of mesosoma 1.6 × as long as its height; notauli narrow, punctate, convergent posteriorly (Fig. 14D); prescutellar sulcus deep, 0.6 × as long as scutellum, with one carina (Fig. 14D); lobes of mesoscutum and scutellum smooth; pronotal side smooth, sparsely crenulated anteriorly (Fig. 14E); precoxal sulcus short, punctate; mesopleuron highly smooth; metapleuron sparsely rugose; propodeum without basal carina, smooth anterio-laterally, nearly areolate-rugose medio-posteriorly (Fig. 14G). Wings. Length of fore wing 2.75 × its width; pterostigma 2.9 × 1-R1; vein 1-R1 0.3 × pterostigma (Fig. 14I); vein r arising near middle of pterostigma, 0.25 × as long as width of pterostigma, 0.2 × vein 2-SR, and 0.2 × vein 1-R1; vein 1-CU1 short, 1-CU1: cu-a: 2-CU1 = 1.5: 2.0: 6.0; hind wing: 1-M: 1r-m: 2-SC+R = 1.5: 2.0: 6.0. Legs. Length of hind femur, tibia and basitarsus 5.1, 11.6 and 9.0 × as long as their maximum width, respectively; hind basitarsus 0.3 × hind tibia; and 0.6 × second-fifth tarsus combined; fourth hind tarsus 0.6 × as long as fifth tarsus (without pretarsus). Metasoma. Length of first tergite 1.6 × its apical width, apical width of first tergite 2.5 × its minimum width (Fig. 14F); first metasomal tergite smooth basally, with sparse striae medially, smooth on apical half (Fig. 14F); the remainder highly smooth; ovipositor sheath and ovipositor tightly attached to metasoma ventrally. Colour. Head yellow; eyes silver-grey; stemmaticum brown; antenna yellow, except from third antennomere to apical one brownish yellow; all legs yellow; mesopleuron and metanotum yellow; mesonotum and propodeum yellowish brown; metasoma yellow; wing veins pale yellow; wing membrane hyaline. Male. Unknown. Host: Unknown. Etymology. Named after type locality, Huu Lien Nature Reserve in Lang Son province, Northern Vietnam. Distribution. NE Vietnam: Lang Son province (Huu Lien NR) (Fig. 21).