Deuterixys longitarsus Zheng & Song, 2020

Deuterixys longitarsus Zheng & Song , sp. nov.

Figures 2 View FIGURE 2 (A-H)

Material examined. Holotype: ♀, Mt. Meihuashan, Fujian, 1988.ix.28, Ge Jianhua ;. Paratype: 1♀, Buyun, Mt. Meihuashan, Fujian, 1988.ix.27, Ge Jianhua ; 1♀, Buyun, Mt. Meihuashan, Fujian, 1988.ix.29, Zhang Xiaobin ; 1♀, Guadun, Mt. Wuyi, Fujian, 1998.viii.1, Yang Jianquan ; 1♀, Guadun, Mt. Wuyi, Fujian, 1992.ix.20, Zou mingquan ; 1♀, Sangang, Mt. Wuyi, Fujian, 1994.viii.13, Zhang Jinming ; 3♀♀, Buyun, Shanghang, Fujian, 1988.ix.23, Guan Baobin ; 1♀, Tongmu, Mt. Wuyi, Fujian, 1998.viii.13, Lin Zhihui ; 1♀, Tongmu, Mt. Wuyi, Fujian, 1998.vii.13, Yang Jianquan ; 1♀, Xianfengling, Mt. Wuyi, Fujian, 1988.vii.22, Zhang Xiaobin ; 1♂, Buyun, Mt. Meihuashan, Fujian, 1988.x.3, Shen Tianshun ; 1♂, Buyun, Mt. Meihuashan, Fujian, 1988.ix.27, Ge Jianhua ; 1♂, Dazhulan, Mt. Wuyi, Fujian, 1993.ix.3, Zhang Feiping ; 1♂, Tongmu, Mt. Wuyi, Fujian, 1988.viii.4, Ge Jianhua ; 1♂, Tongmu, Mt. Wuyi, Fujian, 1998.viii.13, Shi Quanxiu ; 1♂, Buyun, Shanghang, Fujian, 1988.ix.28, Guan Baobin .

Description. Female. Body length 1.9–2.1 mm, fore wing length 2.0 – 2.2 mm.

Head. In dorsal view, 1.9 × as wide as long and 1.1 × as that of mesoscutum. Ocelli in a high triangle, imaginary tangent of posterior margin of anterior ocellus distant from posterior ocelli, POL: OD: OOL= 7: 3: 8. Frons and vertex shiny, scattered with sparsely small punctate and fine setae; vertex narrowed behind eyes, area behind ocellar area smooth and shiny, without setae; temple and gena weakly punctate and shiny, with dense setae. Subcircular in anterior view, with antennal sockets high above middle level of eyes; face slightly convex, finely punctulate associated with long sparsely pilosity; inner margin of eyes roughly parallel to moderately emarginate adjacent to antennal sockets; eyes pilose.Antenna longer than body (23: 19); flagellomeres thin, with bristly setosity, most flagellomeres with placodes arranged regularly in 2 ranks except for last 4 flagellomeres. Flagellomere proportion: 2 L/W = 2.8, 8 L/W = 2.6, 14 L/W = 1.4. L 2/14 = 2.2, W 2/14 = 1.2. F12-15 tightly connected.

.

Mesosoma. Mesoscutum densely and evenly punctate and setose; notauli almost absent. Disc of scutellum also densely punctate with dense short setae all over; scutellar sulcus deep with a few carinae. Propodeum smooth and highly polished, bearing a strong, complete, median carina and a pair of weaker longitudinal carinae running forward from the apical corners; less rugosity on the apical half.

Wings. Fore wing without areolet, vein r emitted from middle of pterostigma and slightly intilted; r and 2-SR meeting at a 165~170° angle; 2-SR: r: width of pterostigma = 18: 17: 17; vein 1- R 1 1.15-1.2 × as long as pterostigma and 5.0 × distance from the apex of 1- R 1 to apex of marginal cell, pterostigma 2.0 × as long as wide. 1-CU1: 2-CU1: m-cu= 9: 11: 9. Hind wing narrow, vein cu-a incurved.

Legs. Hind coxa small, slightly longer than T 1, shiny, scattered with short setae. Hind tibia 0.65–0.7 × as long as hind tarsus; inner hind tibial spurs almost as long as outer one, about 0.27-0.33 × as long as hind basitarsus.

Metasoma. T 1 2.3–2.4 × as long as wide, almost parallel on both sides but weakly constricted at apical, basal half bearing a medial longitudinal groove, apical half moderately arch. T 2+ T 3 broad, rectangular and obviously wider than T 1 (17: 10), slightly constricted at the suture between T 2+ T 3, T 2 0.65-0.73 × as long as its basal width and 1.4 × longer than T 3 (13: 9), the median field of T 2 not obvious. T 2+ T 3 and most T 1 almost completely covered with finely-textured and dense aciculo-rimulose sculpture. Tergites posterior to T 3 more membranous, shiny. All tergites sparsely scattered with setae. Ovipositor short and bending downward, ovipositor sheath 0.3 × as long as hind basitarsus, hairy only on the apical half. Hypopygium short, evenly sclerotized.

Colour. Body mostly fusco-testaceous. Antenna brown; maxillary palp, labial palp and legs yellow, except for hind coxa reddish-brown; apical half of hind tibia and most of hind tarsus light reddish-brown apical metasoma reddish-brown, basal metasoma light yellow (except for T 1- T 3 dark brown). Pterostigma translucent reddish-brown.

Male. Antenna puce; hind tibiae and tarsi yellow; pterostigma opaque yellowish white.

Host. Unknown.

Etymology. The name is derived from the Latin words “longi” (means “long”) and “tarsus” in reference to the long hind tarsus.

Distribution. China ( Fujian).

Remarks. This species is similar to D. bifossalis Zeng & Chen , but can be distinguished from the latter by the median field of T 2 not obvious (vs. the median field of T 2 obvious, nearly trapezoidal, with wide grooves separated from lateral areas); T 3 densely rugulose or subrugulose, dull (vs. T 3 smooth and shiny); pterostigma 2.0 × as long as wide (vs. pterostigma 2.5 × as long as wide).