Hylcalosia carinata sp. nov.

Figs. 1–2

Type material. Holotype, ♀ (ZJUH), “ [SE. China:] Hainan, Mt. Diaoluo, 1–2.?.2007, Liu Jingxian, No. 200704003.” Paratypes : 1♂ (ZJUH), Hainan, Yinggeling, 24–26.?.2007, Liu Jingxian, No. 200704037; 1♀ (ZJUH), Guangdong, Meizhoufengxi, 29.?.2003, Chen Jujian, No. 20048594; 1♀ (ZJUH), Hainan, Yinggeling, 28.?–3.?.2007, Weng Liqiong, No. 200804321.

Diagnosis. Body yellowish (Fig. 1); eye in dorsal view 2.1 × longer than temple (Fig. 2I); eye in lateral view as high as wide (Fig. 2K); frons largely smooth, slightly rugose near antennal sockets; vertex and temple smooth (Fig. 2I); face rather convex in middle, densely and coarsely rugose-reticulate with transverse striation (Fig. 2J); clypeus subtriangular, protruding forward, densely and finely reticulate-punctate (Fig. 2J); mandible rugose and with 4 teeth or lobes (Fig. 2K); notauli crenulated and incomplete, impressed on disc anteriorly (Fig. 2C); medio-posterior depression deep, nearly extending to middle of mesoscutum (Fig. 2C); precoxal sulcus crenulate; metapleuron smooth in middle but reticulate-rugose ventrally (Fig. 2D); surface of propodeum weakly rugose, with a mediolongitudinal carina present on basal half of propodeum, areola present posteriorly (Fig. 2E); pterostigma wide, 3 × as long as maximum width (Fig. 2A); hind coxa smooth (Fig. 2D); metasoma longitudinally striate and some reticulate-rugosity between striae, length of first tergite 0.9 × its apical width (Fig. 2E); setose part of ovipositor sheath 0.5 × as long as fore wing (total visible sheath 0.6 ×), and 1.5 × as long as hind tibia (Fig. 2G); mesosoma and first tergite of metasoma yellowish, second and third tergite of metasoma dark brown (Fig. 2F).

Description. ♀, length of body 3.1 mm, of fore wing 3.2 mm.

Head. Transverse (Fig. 2I), width of head 1.7 × its lateral length (Fig. 2I), and 1.6 × wider than mesoscutum; antenna with 40 segments, third segment (including annellus) 0.8 × longer than fourth segment, length of third and fourth segments 2.5 and 4.0 × their width, respectively (Fig. 2M); length of maxillary palp 1.7 × height of head; eye in dorsal view 2.1 × as long as temple (Fig. 2I); eye in lateral as high as wide; frons largely smooth, slightly rugose near antennal sockets; vertex and temple smooth (Fig. 2I); OOL: diameter of ocellus: POL= 12:5:5; face 1.8 × wider than high, rather convex medially, densely and coarsely rugose-reticulate with transverse striation; clypeus small, subtriangular, protruding forward, densely and finely reticulate-punctate (Fig. 2J); malar space absent; mandible with 4 teeth or lobes, enlarged apically, dorsal tooth enlarged, lobe-shaped (Fig. 2L), ventral tooth medium-sized and lobe-shaped, ventral carina protruding, middle tooth curved (Fig. 2M), medial length of mandible 1.5 × its maximum width.

Mesosoma. Length of mesosoma 1.7 × its height (Fig. 2D); pronope round, wide and deep; medio-anteriorly pronotum inconspicuously crenulate, remainder of pronotum smooth (Fig. 2D); epicnemial area rugose; precoxal sulcus widely crenulate, not reaching middle coxa; pleural sulcus crenulated ventrally; episternal scrobe round and deep; metapleuron smooth medially but reticulate-rugose ventrally (Fig. 2D); notauli crenulated and incomplete, anteriorly impressed on disc, (Fig. 2C); medio-posterior depression deep, nearly extending to middle of mesoscutum, scutellar sulcus deep, with one longitudinal carina, sulcus 4.1 × wider than its maximum length; scutellum smooth (Fig. 2C); surface of propodeum weakly rugose, with a medio-longitudinal carina present on half of propodeum, areola present posteriorly (Fig. 2E).

Wings (Fig. 2 A-B). Pterostigma wide, 3 × longer than its maximum width. r:3-SR:SR1 = 1:3:11; 1-SR+M nearly straight; SR1 straight; r 0.5 × as long as width of pterostigma; cu-a postfurcal; 1-CU1:2-CU1 = 3: 19; 3-CU1 distinct shorter than CU1b; 2-SR:3-SR:r-m = 20:15:12; m-cu postfurcal, converging to 1-M posteriorly; first subdiscal cell 3.3 × as long as wide; M+CU1 largely unsclerotized. Hind wing: M+CU: 1-M: 1r-m = 10:6:5; m-cu far antefurcal.

Legs. Hind coxa smooth, without ventro-basal tubercle; tarsal claws moderately robust, longer than arolium (Fig. 2N); length of femur, tibia and basitarsus of hind leg 4.6, 9.0 and 6.3 × their width, respectively; apical appendages of hind tarsal segments absent, segments ventrally with dense bristles (Fig. 2N).

Metasoma. First tergite widened from base to apex, apical width twice longer than its basal width, length of first tergite 0.9 × its apical width, with distinct dorsal carinae fused in basal half, medially convex (Fig. 2E); dorsope distinct (Fig. 2F); median length of second tergite 0.9 × its basal width, 0.7 × as long as its maximum posterior width, 1.3 × length of third tergite; combined length of second and third tergites 1.2 × their maximum width (Fig. 2F); setose part of ovipositor sheath 0.5 × as long as fore wing (total visible sheath 0.6 ×), and 1.5 × as long as hind tibia (Fig. 2H).

Colour. Yellowish (Fig. 1); metasoma (except yellowish first tergite) and antenna (except yellowish 6 basal segments) dark brown; pterostigma and anterior part of veins brown, remainder of veins and wing membrane hyaline.

Variation. Male paratype similar to female types, body length of ♂ 3.0 mm; of fore wing 3.2 mm; antennal segments of ♂ 43 (1). Females have body length 2.9–3.1 mm, and length of fore wing 3.0– 3.2 mm, eye in dorsal view 2.1–2.4 × as long as temple; face 1.7-1.8 × wider than high.

Comparative diagnosis. This species is similar to H. hymaenei Belokobylskij, but differs from it in having comparatively short temple, eye in dorsal view 2.1–2.4 × as long as temple (versus 1.2–1.7 in H. hymaenei); face 1.7-1.8 × wider than high (versus 2.1-2.7 ×); body yellowish to yellowish brown (versus reddish brownish to black).

Etymology. Named “ carinata ” because the propodeum has a long medio-longitudinal carina: “ carina ” is Latin for “ridge”.