Neostroblia melana Sheng & Watanabe, 2022

Sheng, Mao-Ling, Watanabe, Kyohei & Huang, Rui-Fen, 2022, First Oriental record of genus Neostroblia Heinrich (Hymenoptera, Ichneumonidae, Ctenopelmatinae) with description of one new species, Zootaxa 5115 (2), pp. 274-280 : 275-278

Neostroblia melana Sheng & Watanabe , sp. nov.

Figs 1–12

Material examined. Holotype: CHINA • ♀; Guizhou Province, Jiangkou, Fanjingshan National Natural Reserve, Yapanlin ; 1250m; 21 July 2019; interception trap; GSFGPM . Paratypes: CHINA • 2 ♀♀, 2 ♂♂; Guizhou Province, Jiangkou, Fanjingshan National Nature Reserve, Yapanlin ; 1250m; 21 July to 17 October 2019; interception trap; GSFGPM .

Diagnosis. Face ( Fig. 2 ) approximately 1.7 × as wide as long. Malar space about 0.8 × as long as basal width of mandible. Distance between 2rs-m and 2m-cu 0.9 × as long as 2rs-m. Propodeum ( Fig. 8 ) evenly convex, rough; lateromedian carina indistinct; apical portion of lateral longitudinal carina and pleural carina present. First tergite ( Figs 9, 10 ) approximately 2.1 × as long as posterior width. Body ( Fig. 1 ) almost entirely black.

Description. Female. Body ( Fig. 1 ) length 14.6–15.1 mm. Fore wing length 9.6–10.8 mm. Ovipositor sheath length 0.6–0.7 mm.

Head. Inner orbits almost parallel, slightly concave near antennal sockets. Face ( Fig. 2 ) approximately 1.7 × as wide as long, with dense indistinct punctures, slightly convex medially; upper margin indistinct. Clypeus shiny, approximately 2.2 × as wide as long; subbase transversely convex, with sparse fine indistinct punctures; apical margin evenly convex forward, slightly concave medially. Basal portion of mandible with dense punctures and yellowish brown setae; teeth smooth, upper tooth distinctly longer than lower tooth. Malar space shagreened, with dense brown setae, about 0.8 × as long as basal width of mandible. Gena finely shagreened, evenly convergent backward, with dense dark brown setae and almost even punctures, distance between punctures 0.5–2.0 × diameter of puncture. Vertex ( Fig. 3 ) with texture as that of gena; posterior median portion slightly concave. Postocellar line approximately 0.8 × as long as ocular-ocellar line. Frons slightly evenly concave, indistinctly roughly reticulate. Antenna with 51–52 flagellomeres; ratio of length from first to fifth flagellomeres approximately: 3.0:1.2:1.2:1.1:1.0. Occipital carina complete, upper median portion slightly raised, lower end joining hypostomal carina distinctly above base of mandible.

Mesosoma. Pronotum ( Fig. 4 ) mostly rough, indistinctly punctate; anterior margin with dense fine punctures and yellowish brown setae; upper median portion of lateral concavity with indistinct short transverse wrinkles. Mesoscutum ( Fig. 5 ) with distinct punctures, distance between punctures 0.2–2.5 × diameter of puncture; denser on median portion, distance between punctures 0.2–0.5 × diameter of puncture. Notauli weak, almost parallel. Scutoscutellar groove almost smooth, shiny. Scutellum slightly convex, with distinct punctures, distance between punctures 0.2–1.0 × diameter of puncture. Postscutellum with indistinct shallow punctures, anterior margin transversely concave. Mesopleuron ( Fig. 4 ) almost flat, with surface as pronotum; upper anterior portion beneath subtegular ridge with short longitudinal wrinkles; subanterior median portion with distinct punctures; speculum smooth, partly with sparse punctures. Upper end of epicnemial carina approximately reaching 0.4 distance to subtegular ridge. Metapleuron with texture as mesopleuron; lower posterior portion with short indistinct wrinkles; submetapleural carina complete, anterior portion strong. Claw simple. Ratio of length of hind tarsomeres ( Fig. 6 ) from first to fifth approximately: 5.9:2.5:1.8:1.0:1.8. Wings ( Fig. 7 ) slightly brown, hyaline. Fore wing with vein 1cu-a distal to M&RS by approximately 0.7 × length of 1cu-a. Distance between 2rs-m and 2m-cu 0.9 × as long as 2rs-m. Postnervulus intercepted slightly below middle. Hind wing vein 1-cu about as long as cu-a. Propodeum ( Fig. 8 ) evenly convex, rough, lateral portion with dense gray setae; lateromedian carina absent; apical portion of lateral longitudinal carina and pleural carina present; anterolateral portion distinctly punctate; apical median portion with irregular transverse wrinkles. Propodeal spiracle short oblique elliptical.

Metasoma. First tergite ( Figs 9, 10 ) approximately 2.1 × as long as posterior width, strongly and evenly narrowed to base; latero-median and dorso-lateral carinae absent; shagreened, with fine indistinct punctures, base smooth, shiny; spiracle small, circular, convex, located approximately at middle of first tergite. Second and third tergites distinctly shagreened, with dense short gray brown setae. Second tergite ( Fig. 11 ) approximately 0.8 × as long as posterior width. Third and subsequent tergites almost shiny. Ovipositor sheath ( Fig. 12 ) approximately 3.6 × as long as its width, lateral sides almost parallel. Ovipositor ( Fig. 12 ) compressed, with subapical dorsal notch.

Coloration ( Fig. 1 ). Black, except for following: flagellomeres (9)10 to 12(13), dorsal profile of fore tibia, basal half of middle tibia, ventral profiles of middle tarsomeres 3–4, basal 0.3–0.5 of hind tibia, ventral profiles of hind tarsomeres 3–4 yellowish white. Clypeus irregularly and median portion of mandible, darkish red-brown. Anterior profile and apical portion of fore femur yellowish to reddish brown, ventral profile of tibia yellow brown, tarsus dark brown. Tegula black, anterior portion white. Pterostigma and wing veins brown to blackish brown. Apical portion of ovipositor sheath yellowish white.

Male. Body length 11.5–12.1 mm. Fore wing length 9.0– 9.7 mm.

Antenna with 47–48 flagellomeres. Black, except for following: face, clypeus except apical margin darkish brown, mandible except tooth, flagellomeres (9)10 to 13(14), upper-posterior corner of pronotum, tegula yellowish white. Anterior profile of fore femur yellowish to reddish brown; tarsomeres 1–2, 4 mainly darkish brown. Apical half of middle tibia, base of middle tarsomere 1, middle and hind tarsomeres (2) 3–4 mostly, basal portion of hind tibia yellow white. Pterostigma and wing veins darkish brown. Remainder of characteristic similar to female.

Etymology. The specific name is derived from body being entirely black.

Differential diagnosis. The new species can be easily distinguished from other species of Neostroblia by the following combination of characters: lateromedian carinae of propodeum indistinct; first tergite ( Figs 9, 10 ) 2.1 × as long as posterior width; body almost entirely black; coxae, trochanters and femora black; tibiae black, basal portions white widely.

Figures

FIGURES 1–3. Neostroblia melana Sheng & Watanabe, sp. nov. Holotype. Female 1 Habitus, lateral view 2 Head, anterior view 3 Head, dorsal view.

FIGURES 4–8. Neostroblia melana Sheng & Watanabe, sp. nov. Holotype. Female 4 Mesosoma, lateral view 5 Mesoscutum and Scutellum, dorsal view 6 Hind tarsomeres, lateral view 7 Wings 8 Propodeum, dorsal view.

FIGURES 9–12. Neostroblia melana Sheng & Watanabe, sp. nov. Paratype. Female 9 First tergite, dorsal view 10 First tergite, lateral view. 11 Second tergite, dorsal view 12 Apical portion of metasoma, lateral view.