♀ (NEFU) Yunnan Province, Baoshan City, Mt. Gaoligong, Baihualing, 31. VII.2014–2.VIII. 2014, Hui-Lin Han, YPT.

Clava (Fig. 2) 2.93× as long as wide, longer than scape; metanotum (Fig. 3) with dorsellum rhomboidal; propodeum distinctly shorter than scutellum; phragma broad with posterior margin nearly straight; fore wing (Fig. 4) 3.93× as long as wide, with venation extending 0.7× length of wing; discal setation rather sparse, with about 7 or 8 rows of setae at the broadest part of wing; base of the wing behind submarginal vein asetose; ovipositor (Fig. 6) distinctly exserted, 2.12× as long as metatibia.

Figures 1–6. 

Arescon gaoligongensis sp. n., holotype female: 1 head, dorsal 2 antenna 3 mesosoma, dorsal 4 fore wing 5 hind wing 6 gaster, lateral. Scale bars: 100 μm.

Female (Holotype). Body length 756. Head yellowish brown with eye, ocelli, middle part of transverse trabecula, supraorbital trabecula and mandible dark brown. Antenna yellowish brown with radicle, scape, pedicel and fl₁ paler. Mesosoma largely yellowish brown except a large round spot on about anterior two fifths and two relatively small spots on lateral margins of mesoscutum, a small spot on each axilla anteriorly, dark brown. Wings slightly infuscated, with venation brown. Legs brown with basal parts of coxae, apical parts of femora and last tarsal segments paler. Metasoma pale brown with exerted part of ovipositor darker.

Head. Head (Fig. 1) width 168. Vertex and face with faint reticulate sculpture.

Antenna. Antenna (Fig. 2) sparsely setose. Radicle 0.46× as long as scape; scape about 3.5× as long as wide, with distinct striations which are more or less transverse on base and gradually become oblique distad; pedicel with faint longitudinal striations, about 2× as long as wide, and 2× as long as fl₁; all funicular segments much longer than wide, fl₁ distinctly shortest, without mps; fl₂ slightly longer than fl₃, with 1 mps; fl₃ about as long as fl₄ each with 2 mps; fl₅ slightly shorter than fl₄, with 2 mps; clava 2.93× as long as wide, longer than scape, shorter than fl₄ and fl₅ combined, divided into 3 segments ventrally by 2 incomplete oblique septa, with 6 mps. Measurements (length/width): radicle 38, scape 84/24, pedicel 48/24, fl₁ 24/13, fl₂ 82/17, fl₃ 72/17, fl₄ 72/17, fl₅ 67/19, clava 98/34.

Mesosoma. Mesosoma (Fig. 3) length 277. Pronotum entire, with faint longitudinal striations. Mesoscutum with longitudinal reticulate sculpture on mid lobe and isodiametric reticulate sculpture on lateral lobes. Scutellum transverse, distinctly shorter than mesoscutum (30: 51); anterior scutellum (14: 33) subrectangular, with campaniform sensilla a little nearer to lateral margin than to each other. Metanotum with dorsellum rhomboidal. Propodeum smooth, distinctly shorter than scutellum. Phragma broad with posterior margin nearly straight.

Wings. Fore wing (Fig. 4) length 584, width 149, length/width 3.93, with venation extending 0.7× length of wing; longest marginal setae 152, 1.02× as long as greatest wing width. Fore wing base behind submarginal vein without setae, disc behind basal half of marginal vein with 2 or 3 irregular rows of setae, remaining disc distal to middle of marginal vein with 7 or 8 irregular rows of setae and a bare strip present along about distal one third of posterior margin. Hind wing (Fig. 5) length 545, width 17, length/width 32.4, longest marginal setae 101, about 6× as long as greatest wing width.

Metasoma. Metasoma (Fig. 6) distinctly longer than mesosoma. Petiole short. Gaster (376) with ovipositor length 495, distinctly exserted, 2.12× as long as metatibia (233).

Unknown.

The specific name is derived from the name of the collection locality of the type species.

Arescon gaoligongensis sp. n. is similar to A. iridescens, but can be distinguished from it by the key given above. The new species is also similar to A. enocki (Subba Rao & Kaur) in relatively longer fore wing venation and fore wing disc setation, but can be distinguished from it by the relatively shorter clava, 2.9× as long as wide, shorter than fl₄ and fl₅ combined (clava relatively longer, 4.0× as long as wide, much longer than fl₄ and fl₅ combined in A. enocki); broader fore wing, 3.9× as long as wide (much narrower, 4.5× as long as wide in A. enocki); and the ovipositor characters, ovipositor originated from base of gaster, distinctly exserted (ovipositor originated from distal part of gaster, and slightly exserted in A. enocki).

♀ (NEFU) Xizang Autonomous Region (= Tibet), Mt. Sejila, 30.VII. 2013–01.VIII. 2013, Hui-Lin Han, Zhi-Guang Wu, YPT.

6 females, 1 male. Xizang Autonomous Region (= Tibet): same data as holotype (1♀, NEFU); Linzhi City, 28.VII. 2012–04.VIII. 2012, Zhao-Hui Pan, MT (2 ♀♀, NEFU); Mt. Sejila, 27. VII. 2013, Hui-Lin Han, Zhi-Guang Wu, YPT (1♀, NEFU); Mt. Sejila, 4100 m, 22. VIII. 2014–23. VIII. 2014, Hui-Lin Han, YPT (2 ♀♀ 1♂, NEFU).

Antenna (Fig. 7) of female with fl₂ distinctly longer than each of fl₃–fl₅; clava 2.2–2.6× as long as wide, slightly shorter than scape; metanotum (Fig. 8) with dorsellum triangular; propodeum longer than scutellum; phragma broad with posterior margin nearly straight; fore wing (Fig. 9) 5.05–5.35× as long as wide, with venation extending just about half wing length; fore wing base behind submarginal vein with 2 or 3 rows of setae, with a small oval bare area behind the basal part of submarginal vein along posterior margin, and disc at the broadest part of wing with about 12 or 13 irregular rows of setae; ovipositor (Fig. 11) 1.03–1.19× as long as metatibia, distinctly exserted.

Figures 7–11. 

Arescon stenopterus sp. n., holotype female: 7 antenna 8 mesosoma, lateral 9 fore wing 10 hind wing 11 gaster, lateral. Scale bars: 100 μm.

Female (holotype data in square brackets). Body length 730–980 [780]. Head brown with eye, ocelli, transverse trabecula and part of supraorbital trabecula dark brown. Antenna brown with radicle, scape and pedicel paler. Mesosoma brown with frenum pale yellowish brown. Wings infuscate with base of fore wing brown and largely infuscate behind marginal vein. Legs brown with trochanters and apical parts of femora paler. Metasoma brown with petiole pale yellowish brown and base of gaster and tip of ovipositor pale brown.

Head. Vertex weakly sculptured, ocelli on an almost rectangular stemmaticum; face with faint sculpture.

Antenna. Antenna (Fig. 7) sparsely setose. Radicle 0.31–0.35 [0.35]× as long as scape; scape with faint longitudinal striations, 4.2–4.9 [4.3]× as long as wide; pedicel with faint longitudinal striations, slightly shorter than fl₁; all funicular segments much longer than wide, fl₁–fl₃ without mps; fl₁ distinctly shortest, fl₂ distinctly longest, more than twice length of fl₁; fl₃–fl₅ slightly shorter and wider distad; fl₄ with 1 mps; fl₅ with 2 mps; clava 2.2–2.6 [2.6]× as long as wide, slightly shorter than scape, shorter than fl₄ and fl₅ combined, with 6 mps. Measurements (length/width): radicle 36–48 [38], scape 108–144/20–31 [113/26], pedicel 48–60/34–60 [50/38], fl₁ 46–58/14–19 [46/17], fl₂ 91–144/14–17 [110/14], fl₃ 60–77/17–22 [70/19], fl₄ 60–82/20–24 [67/26], fl₅ 58–72/22–26 [65/26], clava 103–118/43–53 [110/43].

Mesosoma. Mesosoma (Fig. 8) with faint reticulate sculpture. Scutellum distinctly shorter than mesoscutum (57: 84); anterior scutellum subrectangular, with campaniform sensilla a little nearer to lateral margins than to each other. Metanotum with dorsellum distinctly triangular. Propodeum smooth, longer than scutellum medially. Phragma broad, with posterior margin nearly straight.

Wings. Fore wing (Fig. 9) length 950–1232 [1000], width 168–244 [188], length/width 5.05–5.35 [5.30], with venation extending about 0.46× length of wing; longest marginal setae 242–300 [242], 1.05–1.34 [1.29]× as long as greatest wing width. Fore wing base behind submarginal vein with 2 or 3 rows of setae, with a small oval bare area behind basal part of submarginal vein along posterior margin; disc at broadest part of wing with 12 or 13 irregular rows of setae. Hind wing (Fig. 10) length 718–990 [750], width 26–43 [33], length/width 23–26 [23], longest marginal setae 182–212 [200], about 6–7 [6]× as long as greatest wing width.

Metasoma. Metasoma (Fig. 11) distinctly longer than mesosoma. Petiole short, trapezoidal. Ovipositor length 300–410[320], distinctly exserted, 1.03–1.19 [1.16]× as long as metatibia (260–400 [275]).

Male. Head (Fig. 12) width 211. Antenna as in Fig. 13. Measurements (length): scape 115, pedicel 55, fl₁ 74, fl₂ 103, fl₃ 96, fl₄ 91, fl₅ 98, fl₆ 101, fl₇ 98, fl₈ 98. Fore wing (Fig. 14) length 1175, width 210, length/width 5.6, longest marginal setae 260, 1.24× as long as greatest wing width. Hind wing (Fig. 15) length 900, width 36, length/width 25, longest marginal setae 216, 6× as long as greatest wing width. Genitalia (Fig. 16) length 154.

Figures 12–16. 

Arescon stenopterus sp. n., paratype male: 12 head, dorsal 13 antenna 14 fore wing 15 hind wing 16 genitalia. Scale bars: 100 μm.

Unknown.

From Greek, stenos meaning narrow and pteron meaning wing. The specific name refers to the relatively narrow fore wing.

Arescon stenopterus sp. n., is similar to A. dimidiatus (Curtis) in that the fore wing has the venation extending just about half of the wing length and the dorsellum is distinctly triangular, but it can be distinguished from A. dimidiatus by the relatively longer fl₃, much longer than fl₁ (about as long as or slightly longer than fl₁ in A. dimidiatus); relatively shorter clava, distinctly shorter than fl₄ and fl₅ combined (slightly longer than fl₄ and fl₅ combined in A. dimidiatus); and the dimensions of fore wing length and width, 5.05–5.35× as long as wide (6.5× as long as wide in A. dimidiatus).

♀ (NEFU) Yunnan Province, Ruili City, Mengxiu County, 26–27.IV.2013, Xiang-Xiang Jin, Hui-Lin Han, Guo-Hao Zu, Chao Zhang, YPT.

5 females, 2 males. Yunnan Province: Longchuan County, 26–27.IV.2013, Xiang-Xiang Jin, Hui-Lin Han, Guo-Hao Zu, Chao Zhang, YPT (3♀♀ 1♂, NEFU); Puer City, Lancang County, 19–20.IV.2013, Xiang-Xiang Jin, Hui-Lin Han, Guo-Hao Zu, Chao Zhang, YPT (1♀, NEFU); Mengla County, Menglun Town, 13.II. 2014, Hui-Lin Han, Guo-Hao Zu, Zhong-Ping Xiong, sweeping (1♀ 1♂, NEFU).

Antenna (Fig. 17) of female with fl₂–fl₅ almost subequal in length; clava 2.67–3.29× as long as wide, shorter than fl₄ and fl₅ combined; metanotum (Fig. 18) with dorsellum rhomboidal; propodeum shorter than scutellum; phragma with posterior margin narrowly rounded; fore wing (Fig. 19) 3.94–4.10× as long as wide, with venation extending about 0.7× length of wing; disc nearly asetose, only with a line along apical and posterior margins of wing, 1 or 2 irregular rows of setae near posterior margin and several scattered setae distally; ovipositor (Fig. 21) about 1.6–1.9× as long as metatibia, distinctly exserted.

Figures 17–21. 

Arescon sparsiciliatus sp. n., holotype female: 17 antenna 18 mesosoma, dorsal 19 fore wing 20 hind wing 21 body, dorsal. Scale bars: 100 μm.

Female (holotype data in square brackets). Body length 640–700 [655]. Head dark yellowish brown with eyes, ocelli, and transverse trabecula black; mandible brown. Antenna except clava pale brown, clava brown. Mesosoma mostly yellow with middle part of pronotum, about anterior half of mesoscutum except laterally, a small spot on tegula, middle part of metanotum, and propodeum largely except anterior lateral corner, dark brown; anterior internal part of axilla and anterior scutellum pale brown to yellowish brown. Wings uniformly infuscate with venation brown. Legs pale brown with tips of apical tarsomere of all legs brown. Metasoma pale brown with tip of gaster brown.

Head. Vertex and face with faint reticulate sculpture.

Antenna. Antenna (Fig. 17) sparsely setose. Radicle 0.24–0.31 [0.31]× as long as scape; scape with faint longitudinal striations, 3.63–4.67 [4.42]× as long as wide; pedicel with faint longitudinal striations, 1.6–1.9 [1.6]× as long as wide, longer than fl₁; all funicular segments much longer than wide, fl₁ distinctly shortest, without mps; fl₂–fl₅ each with 2 mps; fl₂ slightly shorter than fl₃; fl₃ about as long as fl₄, slightly longer than fl₅; clava 2.67–3.29 [2.76]× as long as wide, slightly longer than scape, shorter than fl₄ and fl₅ combined, with 7 mps. Measurements (length/width): radicle 24–29 [26], scape 84–106/19–28 [84/19], pedicel 38–46/24–26 [38/24], fl₁ 19–24/10 [24/10], fl₂ 50–77/17 [62/17], fl₃ 62–72/17 [65/17], fl₄ 65–74/17 [65/17], fl₅ 57–67/18 [60/18], clava 91–110/29–36 [91/33].

Mesosoma (Fig. 18). Mesoscutum longitudinally striate. Scutellum with faint reticulate sculpture distinctly shorter than mesoscutum (27: 45), with campaniform sensilla much nearer to lateral margins than to each other. Metanotum with dorsellum rhomboidal. Propodeum smooth, shorter than scutellum. Phragma with posterior margin narrowly rounded.

Wings. Fore wing (Fig. 19) length 535–560 [535], width 130–142 [135], length/width 3.94–4.10 [3.96], with venation extending 0.7× length of wing; longest marginal setae 144–175 [175], 1.06–1.30 [1.30]× as long as greatest wing width. Discal setation very sparse, only with a line along distal and posterior margins of wing, 1 or 2 irregular rows along near posterior margin, about 5–8 setae scattered on the distal part of wing and sometimes 1–5 seta(e) near stigmal vein. Hind wing (Fig. 20) length 475–530 [475], width 19, length/width 25–28 [25], longest marginal setae 101–119 [119], 5.3–6.3 [6.3]× as long as greatest wing width.

Metasoma. Metasoma (Fig. 21) distinctly longer than mesosoma. Petiole transverse. Ovipositor (340–400 [355]) about 1.6–1.9 [1.8]× as long as metatibia (194–204 [203]), distinctly exserted.

Male. Body length 640. Antenna (Fig. 23). Measurements (length): scape 74, pedicel 36, fl₁ 48, fl₂ 62, fl₃ 60, fl₄ 58, fl₅ 58, fl₆ 55, fl₇ 55, fl₈ 53, fl₉ 53, fl₈ 50, fl₉ 48. Fore wing (Fig. 25) length 600, width 158, length/width 3.8, longest marginal setae 166, 1.05× as long as greatest wing width. Hind wing (Fig. 26) length 550, width 19, length/width 29, longest marginal setae 110, 5.79× as long as greatest wing width.

Figures 22–27. 

Arescon sparsiciliatus sp. n., paratype male: 22 head, dorsal 23 antenna 24 mesosoma, dorsal 25 fore wing 26 hind wing 27 gaster, lateral. Scale bars: 100 μm.

Arescon sparsiciliatus sp. n. is similar to A. zenit in that fore wing venation extends almost 3/4 of the wing length and fl₂–fl₅ are almost subequal in length, but can be distinguished from A. zenit by the relatively more sparsely setose fore wing (more densely setose in A. zenit); relatively wider fore wing, at most 4.1× as long as wide (about 6.7× as long as wide in A. zenit); the longest marginal setae relatively shorter, at most 1.3× greatest wing width (over 2× greatest wing width in A. zenit).