Notes on the genus Streblocera Westwood, 1883 (Hymenoptera: Braconidae: Euphorinae) from Vietnam, with description of four new species Author Long, Khuat Dang Author Nhi, Pham Thi text Zootaxa 2020 2020-04-28 4767 3 402 414 journal article 22511 10.11646/zootaxa.4767.3.2 b88513a0-1670-4cd5-8f94-f890d70d16ef 1175-5334 3772959 urn:lsid:zoobank.org:pub:91221D05-77DA-4883-A301-96607B86302C Streblocera ( Eutanycerus ) quangbinhensis Long , sp. n. ( Figs 12–22 ) Material examined. Holotype ♀ , “Euph. 159 ” ( IEBR ), NC Vietnam : Quang Binh , Minh Hoa , Cha Lo , forest, 18.iv.1998 , KDLong . Paratypes 2 ♀ , “Euph. 158 ” ( IEBR ), locality as holotype ; “Euph. 201 ” ( IEBR ), NC Vietnam : Ha Tinh , Huong Son, Rao An, forest path, 200m , 22.iv.1998 , KDLong. Diagnosis . Antenna 25 antennomeres; scapus long, evenly curved, with tooth-shaped horn in basal 0.2 of scapus ( Fig. 19 ); length of scapus 9.4 × its maximum width, and 2.3 × of head height (in dorsal view); tentorial pits at lower level of eyes ( Fig. 14 ); malar space 1.3 × as long as basal width of mandible; length of mesosoma 1.8 × as long as its height; propodeum with rather long basal carina and areola-shaped median area; first metasomal not narrowed behind spiracle; length of first tergite 1.6 × its apical width; apical width of first tergite 3.3 × its minimum width. This new species is close to both S. tuyenquangnesis sp. n. and S. pila Belokobylskij , differences between these species are given in the key. The new species can be distinguished by shorter first metasomal tergite, 1.6 × its apical width (2.3–2.5 × its apical width in S. tuyenquangnesis and S. pila ). Description . Holotype , ♀ ; body length 4.5 mm , fore wing length 4.2 mm , ovipositor sheath 0.8 mm ( Fig. 12 ). Head . Antenna with 25 antennomeres; scapus long, slightly curved medially, length of scapus 9.4 × its maximum width (75: 8), with tooth-shaped horn in basal 0.2 of scapus (16: 75); scapus 2.3 × of head height (75: 33); third antennomere 1.3 × fourth (8: 6); second-seventh flagellomeres serrate ventrally ( Fig. 18 ); length from eighth flagellomere to apex of antenna 0.9 × scapus (71: 75); in dorsal view, width of head 1.5 × its median length (49: 33), 1.4 × width of mesoscutum (without tegulae) (49: 34); temple roundly narrowed behind eye; eye 2.25 × as long as broad; length of eye 1.8 × as long as temple (18: 10); ocelli small, POL: OD: OOL = 5: 3: 11 ( Fig. 13 ); in lateral view, transverse diameter of eye as long as temple (14: 14); in frontal view, diameter of antennal socket 1.1 × distance between sockets (9: 8); face width subequal to length of face and clypeus combined (28: 29), and 1.5 × height of eye (28: 19); clypeus margin straight; malar space 1.3 × as long as basal width of mandible (9: 7), and 0.5 × as long as eye height (9: 19); distance between tentorial pits 1.2 × distance from pit to eye margin (11: 9); face densely punctate ( Fig. 14 ); frons punctate laterally, with median sparse striae ( Fig. 13 ); vertex and temple almost smooth ( Figs 13, 15 ). Mesosoma . Length of mesosoma 1.8 × as long as its height (83: 46); notauli deep, sparsely crenulated anteriorly, widened posteriorly and largely rugose ( Fig. 16 ), median lobe of mesoscutum without median depression; prescutellar sulcus rather wide, rugose, with one carina, and 0.7 × as long as scutellum (6: 9) ( Fig. 16 ); lobes of mesoscutum and scutellum sparsely punctate; subalar depression rugose ( Fig. 17 ); pronotal side crenulated anteriorly, rugose ventrally and posteriorly ( Fig. 17 ); precoxal sulcus deep and wide, crenulate; mesopleuron smooth medially, rugose ventrally ( Fig. 17 ); metapleuron rugose; propodeum with rather long basal carina ( Fig. 21 ) and areola-shaped median area, punctate basally, largely rugose apically. FIGURE 12 . Streblocera ( Eutanycerus ) quangbinhensis Long , sp. n. Holotype, female. Habitus, lateral view FIGURES 13–22 . Streblocera ( Eutanycerus ) quangbinhensis Long , sp. n. Holotype, female. 13 Head, dorsal view 14 Head, frontal view 15 Head, lateral view 16 Mesonotum 17 Mesopleuron 18 First-seventh flagellomeres, lateral view 19 Scapus 20 First metasomal tergite 21 Propodeum 22 Fore wing. Wings . Length of fore wing 2.8 × its width (127: 45); length of pterostigma 4.0 × its width (40: 10), and 1.5 × vein 1-R1 (40: 26) ( Fig. 22 ); vein r arising just behind middle of pterostigma, 0.1 × as long as width of pterostigma (4: 40), and 0.15 × vein 1-R1 (4: 26); vein 1-CU1 short and thick, nearly quadrate; cu-a 0.3 × vein 2-CU1 (5: 17) ( Fig. 22 ); length of hind wing 4.2 × its width (122: 29); vein 1-M: 1r-m: 2-SC+R = 5: 8: 8. Legs . Length of hind femur, tibia and basitarsus 7.1, 16.25 and 14.0 × as long as their width, respectively; hind basitarsus 0.9 × hind tibia (58: 65); hind basitarsus 0.4 × hind tibia (28: 65), and as long as second-fifth tarsus (28: 28); fourth hind tarsus 0.7 × fifth tarsus without pretarsus (5:7). Metasoma . First metasomal tergite not narrowed behind spiracle; length of first tergite 1.6 × its apical width (32: 20); apical width of first tergite 3.3 × its minimum width (20: 6); ovipositor sheath 0.2 × fore wing (8: 45), and 0.9 × first tergite (30: 32); first tergite almost smooth basally and medially, striate apically ( Fig. 20 ); the rest tergites highly smooth. Colour . Body yellow, except first metasomal tergite and ovipositor sheath yellowish-brown; eyes brownishgrey; wing veins yellow; wing membrane hyaline. Male . Unknown. Host : Unknown. Etymology . Named after type locality, Quang Binh Province , North Central Vietnam . Variation . Paratypes , females, 23 antennomeres, body length 4.0– 4.2 mm , fore wing 4.0 mm. Distribution . NC Vietnam : Ha Tinh , Quang Binh .