Heterospilus (Heterospilus) densistriatus, Tang, Pu, Belokobylskij, Sergey A., He, Jun-Hua & Chen, Xue-Xin, 2013

Tang, Pu, Belokobylskij, Sergey A., He, Jun-Hua & Chen, Xue-Xin, 2013, Heterospilus Haliday, 1836 (Hymenoptera: Braconidae, Doryctinae) from China with a key to species, Zootaxa 3683 (3), pp. 201-246 : 216

Heterospilus (Heterospilus) densistriatus sp. nov.

( Fig. 5 )

Description. Female. Body length 3.4 mm; fore wing length 3.3 mm.

Head. Antennae slender, filiform, more than 24-segmented (apical segments missing). Scape 1.2 times as long as maximum width. First flagellar segment 4.0 times as long as its apical width, as long as second segment. Head behind eyes (dorsal view) distinctly and roundly narrowed. Width of head 1.6 times its median length. Eye 2.3 times as long as temple (dorsal view). Ocelli arranged in triangle with base 1.5 times its sides. POL: OD: OOL = 3: 3: 7. Vertex and frons smooth. Vertex with sparse, short setae. Face finely striate-rugose laterally, its width almost equal to height of eye, 1.2 times height of face and clypeus combined. Eye glabrous, 1.3 times as high as broad. Malar space 0.3 times height of eye, 0.8 times basal width of mandible. Malar suture absent. Occipital carina complete dorsally, fused with hypostomal carina ventrally.

Mesosoma. Length 1.6 times its height. Mesoscutum almost smooth, highly and perpendicularly elevated above pronotum, with sparse setae arranged along notauli. Notauli shallow, sparsely and distinctly crenulate. Scutellum smooth. Prescutellar depression deep, rather long, smooth, with three distinct carinae, 0.4 times as long as scutellum. Subalar depression rather wide, coarsely rugose-striate. Precoxal sulcus deep, smooth, running along anterior 0.7 of lower part of mesopleuron. Propodeum with distinctly delineated by carinae and long basolateral areas, with indistinct areola, basal carina short; basolateral areas almost smooth, distinctly rugulose-reticulate along carinae; remaining part of propodeum coarsely rugose-areolate.

Wings. Fore wing 3.1 times as long as maximum width. Vein r arising almost from middle of pterostigma. 3-SR forming very obtuse angle with r. 3-SR: r: SR1 = 18: 8: 42. First discal cell 1.5 times as long as maximum width. 1- SR+M distinctly curved. m-cu postfurcal. Hind wing: M+CU almost as long as 1-M. m-cu almost straight, oblique towards base of wing, antefurcal, pigmented.

Legs. Hind coxa finely and distinctly striate dorsally. Hind femur smooth, 3.6 times as long as wide. Hind tibia with short, dense setae dorsally; length of these setae 0.3–0.7 times maximum width of hind tibia. Hind tarsus 0.9 times as long as hind tibia. Hind basitarsus 0.5 times as long as second-fifth segments combined; second tarsal segment 0.7 times as long as basitarsus, 1.6 times as long as fifth segment (except pretarsus).

Metasoma. Almost as long as mesosoma and head combined. First tergite with more or less distinct, weakly and curvedly convergent posteriorly dorsal carinae, densely and coarsely striate; apical width of tergite 2.0 times its minimum width, length 1.1 times its maximum width. Suture between second and third tergites almost straight. Second tergite entirely and densely striate, median length of tergite 0.5 times its basal width, 0.7 times length of third tergite. Third tergite distinctly and densely striate in basal half. Remaining tergites smooth. Ovipositor sheath 1.2 times as long as metasoma and 0.6 times as long as fore wing.

Colour. Head brownish yellow, darker dorsally. Mesosoma and metasoma black. Antennae brownish yellow to black, two basal segments brownish yellow. Palpi pale yellow. Legs yellow, all coxae and trochanters pale yellow. Ovipositor sheath dark brown, paler basally. Wings faintly infuscate. Pterostigma dark brown.

Male. Unknown.

Material examined. Holotype: Ƥ, China, Hunan Prov., Shimen, Hupingshan, 12.VII.2005, Ma Li, No. 200900964 ( ZJUH).

Diagnosis. This new species is similar to H. chinensis Chen et Shi , but differs in having the occipital carina fused with hypostomal carina ventrally, notauli shallow, hind coxa finely and distinctly striate, hind femur smooth, and ovipositor sheath long.

Etymology. From Latin “densus” meaning “dense”, and “striatus” meaning “striate”.

Distribution. China (Hunan).

Figures

FIGURE 5. Heterospilus (H.) densistriatus sp. nov. A, habitus, lateral aspect; B, head, dorsal aspect; C, head, frontal aspect; D, wings; E, antennae; F, mesosoma, lateral aspect; G, metasoma, dorsal aspect; H, propodeum, dorsal aspect; I, mesoscutum, dorsal aspect. Scale bar 0.5 mm.