Halycaea nigricoxis, Tang, Pu, Belokobylskij, Sergey A., Achterberg, Cornelis Van & Chen, Xue-Xin, 2012

Tang, Pu, Belokobylskij, Sergey A., Achterberg, Cornelis Van & Chen, Xue-Xin, 2012, Halycaea Cameron, 1903 (Hymenoptera: Braconidae, Doryctinae) from China with a key to world species, Zootaxa 3218, pp. 18-30 : 24-26

Halycaea nigricoxis sp. nov.

( Figs 14–20 )

Holotype. Ƥ, China, Hainan Prov., Diaoluoshan, 16–17.VII.2006, Liu Jingxian, No. 200802294 ( ZJUH).

Description. Female. Body length 9.3 mm; fore wing length 7.2 mm.

Head. Antennae slender, filiform, 62-segmented. Scape 1.8 times as long as its maximum width. First flagellar segment 4.8 times as long as its apical width, 2.4 times as long as second segment. Penultimate segment 3.0 times as long as wide, 0.6 times as long as first flagellar segment, 0.7 times as long as apical segment. Head width 1.3 times its median length. Vertex smooth. Frons weakly concave, entirely rugose-striate; temple smooth. Temple behind eyes roundly narrowed in dorsal view. Transverse diameter of eye 1.3 times as long as temple in dorsal view. Ocelli medium-sized, in triangle with base equal to its sides. POL: OD: OOL=4: 6: 16. Eye glabrous, 1.3 times as high as broad. Malar space 0.4 times height of eye, 0.7 times basal width of mandible. Face densely striate, with rugulosity between striae. Face width 1.1 times height of eye, 1.1 times height of face and clypeus combined. Malar suture absent. Hypoclypeal depression round, its width almost equal to distance from edge of depression to eye, 0.4 times width of face. Occipital carina dorsally complete and distinctly curved medially, not fused below with hypostomal carina. Palpi long, length of maxillary palpus 1.6 times height of head (without mandible). Vertex mostly glabrous, with very sparse, erect and rather short setae laterally, temple with very dense semi-erect and rather long setae.

Mesosoma. Mesosoma weakly depressed, its dorsal side almost flat. Length 2.7 times its height. Sides of pronotum rugulose-punctate at most part. Posterior half of pronotum with weakly convex lobe dorsally and with distinct pronotal keel, which is situated close to mesoscutum, but not fused with it medially. Mesoscutum entirely densely punctate-granulate. Median lobe of mesoscutum weakly roundly convex, with a shallow and wide median longitudinal furrow. Notauli deep anteriorly, shallow posteriorly, crenulate. Prescutellar depression rather deep, with a distinct median carina, 0.4 times as long as scutellum. Scutellum finely granulate. Metanotum without median tooth. Mesopleuron punctate, but its small median part smooth. Subalar depression shallow, rather wide, rugose. Precoxal sulcus distinct, shallow, rather wide and crenulate, connected with prepectal carina anteriorly, running ventrally along entire length of mesopleuron, weakly curved in posterior half. Propodeum coarsely rugoseareolate, almost smooth at small basolateral areas, with an almost complete median carina. Propodeum without lateral tubercles. Mesoscutum entirely shortly and densely setose. Mesopleuron almost entirely densely setose.

Wings. Fore wing 4.7 times as long as maximum width. Pterostigma 4.7 times as long as wide. Vein r arising distinctly before middle of pterostigma. 1-R1 1.4 times as long as pterostigma. 3-SR: r: SR1: 2-SR= 27: 7: 60: 18. Second submarginal cell long, 3.7 times as long as maximum width, 0.9 times as long as first subdiscal cell. Vein 1- SR+M weakly sinuate. Vein m-cu postfurcal. Hind wing with 6 hamuli. Vein M+CU 0.2 times as long as 1-M vein. Vein m-cu straight, short, pigmented, postfurcal.

Legs. Fore tarsus very long and slender, 2.0 times as long as fore tibia. Fore tibia with very small spines arranged in narrow band. Hind coxa coarsely transversely rugose-striate dorsally, punctate laterally. Baso-ventrally hind coxa angled and with a small tubercle. Hind femur 3.2 times as long as maximum width. Hind tarsus slender, almost as long as hind tibia. Hind basitarsus 0.6 times as long as second-fifth segments combined; second tarsal segment 0.6 times as long as basitarsus, 1.2 times as long as fifth segment (without pretarsus).

Metasoma 1.3 times as long as mesosoma and head combined. First tergite with distinct dorsope, with small spiracular tubercles in basal 0.2, almost linearly widened from base to apex. First tergite densely areolate. Maximum width of first tergite 1.6 times its minimum width; its length 2.4 times maximum width, about 2.0 times length of propodeum. Second tergite with distinct anterolateral furrows, and with triangular area in basal 0.9; tergite 1.2 times as long as its basal width, 1.5 times as long as third tergite. Triangular area petiolate posteriorly, its length 1.5 times basal width. Suture between second and third tergites deep, narrow, weakly curved medially towards base of tergite. Second tergite entirely, third tergite largely (except smooth apical part) and basal half of fourth tergite with very dense reticulation; remaining tergites smooth. Hypopygium obtuse apically. Ovipositor sheath 1.2 times as long as body, 1.8 times as long as fore wing.

Colour. Head red. Mesosoma and metasoma black. Antenna black, two basal segment reddish brown. Palpi pale yellow. All coxae, trochanters and femora black; all tibiae almost brown or dark brown, mid and hind tibiae pale basally; all tarsi almost brown or dark brown. Wings faintly infuscate. Pterostigma dark brown.

Male. Unknown.

Diagnosis. This new species is similar to H. erythrocephala Cameron , but differs in occipital carina dorsally complete and distinctly curved medially; fore wing vein r distinctly arising before the middle of pterostigma; hind wing with 6 hamuli; and hind femur wider, 3.2 times as long as wide.

Distribution. China (Hainan).

Etymology. From Latin “nigri” meaning “black”, and “coxa” meaning “coxa”.

Figures

FIGURES 14 – 20. Halycaea (Halycaea) nigricoxis sp. nov. 14, habitus, lateral aspect; 15, head, frontal aspect; 16, fore wing; 17, head, dorsal aspect; 18, metasoma, dorsal aspect; 19, mesosoma, dorsal aspect; 20, hind coxa. Scale bar 5 mm.