| 1 | Wing with cell |
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| – | Wing without cell |
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| 2 | Antenna of male approximately as long as body (Alexander, 1933: 150) |
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| – Antenna of male approximately three times as long as body (Figs 34; Alexander, 1973: 8; Alexander, 1933: 149) |
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| 3 | Femora yellow (Figs 34; Alexander, 1973: 9); |
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| – | Basal 1/3 of femora yellow, outer 2/3 black (Alexander, 1933: 149); |
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| 4 | Wing without markings (Figs 22, 24, 28) |
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| – | Wing bicolorous, with markings (Figs 1, 3, 9, 10, 12, 16, 46, 48) |
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| 5 Wing without stigma (Alexander, 1933: 158); |
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| – Wing with stigma; |
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| 6 | Antenna of male approximately as long as body (Alexander, 1933: 151); |
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| – | Antenna of male approximately three times longer than body (Figs 22; Alexander, 1973: 8); |
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| 7 | Male terminalia yellow (Fig. 46); wing with many hyaline markings; |
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| – | Male terminalia black or dark brown (Figs 1, 9, 10); wing with a whitened or hyaline marking before discal area; |
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| 8 | Antenna blackish brown; femora blackish brown; abdomen of male with four pale white gray markings (Figs 9, 10) ...... |
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| – | Scape and pedicel blackish brown, flagellum reddish yellow except outer two segments dark brown; basal 5/6 of femora yellow, outer 1/6 dull black; abdomen glossy black or dull black (Fig. 1; Alexander, 1971: 116) |
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2 males (
. Antenna has 8 segments. Wing is brown, but narrowly yellow at base; anal cells are much paler; cells
. Male (
Thorax (Figs 1, 2) dull black with blackish brown setae. Legs with blackish brown setae; coxae and trochanters blackish brown; basal 5/6 of femora yellow, outer 1/6 dull black; tibiae obscure yellow, black apically; tarsi dark brown. Wing (Figs 1, 3) brown, narrowly yellowed at base; anal cells much paler; cells
Abdomen (Fig. 1) with short black setae. Segments 1–6 extensively glossy black, segments 7–8 dull black.
Male terminalia (Figs 1, 4–8) with 180° rotation, dull black with black setae. Posterior margin of ninth tergite with a V-shaped notch, both sides of notch with a lateral projection; posterior margin of ninth sternite with a deep V-shaped shallow; gonocoxite moderately stubby; clasper of gonostylus with long setae at base, slender, terminal spine decurved; lobe of gonostylus short and stout, terminal margin swollen with long setae; interbase triangular; aedeagus longer, apically directed ventrally.
. Unknown.
. India (Assam), China (Xizang).
. This species was known previously only from India. With the present contribution it is recorded from China for the first time.
. 1 male (
. Antenna has 8 segments. Wing is brown, but yellowed at basal 1/5; anal cells are much paler; a white discal area is before cord, including cell
. Male (
Head (Figs 9–11) velvet black with black setae. Rostrum and palpus blackish brown. Antenna 8 segmented, blackish brown with brown setae.
Thorax (Figs 9–11) velvet black with blackish brown setae. Legs with blackish brown setae; coxae and trochanters velvet black with long setae; femora, tibiae and tarsi blackish brown. Wing (Figs 9–10, 16) brown, basal 1/5 yellowed, anal cells much paler; a white discal area before cord, including cell
Abdomen (Figs 9–10) with short black setae. Segments 2–5 elongate, shining black at base, pale white gray in middle, velvet black at tip; segments 1 and 6–7 velvet black; segment 8 shining black.
Male terminalia (Figs 9–10, 17–21) shining black with blackish brown setae. Posterior margin of ninth tergite produced, its margin concave; posterior margin of ninth sternite with a deep U-shaped shallow; gonocoxite moderately stubby; clasper of gonostylus with long setae at base, slender, terminal spine decurved; lobe of gonostylus short and stout, terminal margin swollen with long setae; interbase triangular, stubby at base; aedeagus longer, apically directed ventrally.
Female (Figs 12–15) resembles male. Abdomen shorter; tergites 2, 4–5 pale white gray at base, velvet black at tip; tergites 1, 3, 6–7 velvet black; sternites 1–7 velvet black; segment 8 velvet orange.
Ovipositor (Figs 12–15) elongate, velvet orange. Cercus narrowed toward tip. Hypogynial valve shorter, narrowed toward tip.
. Afghanistan; China (Sichuan, Guangdong, Xizang), India (Assam and/or Arunachal Pradesh), Malaysia (Peninsula), Nepal.
. This species is here recorded from Xizang, China for the first time.
. 19 males, 2 females (
. Front and mouth parts are very reduced; antenna is very long and 6-segmented; vertical tubercle is very large. Wing is pale yellow;
. Male (
Head (Figs 22–23) brown. Front and mouth parts very reduced, brownish yellow, palpus brown. Antenna 6-segmented, very long approximately three or four times as long as wing; scape and pedicel shorter, brownish yellow; flagellum very long, first flagellomere brownish yellow at base, brown at tip; remainder of flagellum brown with short blackish brown setae. Vertical tubercle more brown, very large, bulbous with setae on posterior aspect.
Thorax (Figs 22–23) brownish yellow to brown with gray setae. Pronotum brownish yellow; propleuron brown; prescutum dark brown with a broad brown stripe at middle; prescutal suture brown; scutum brownish yellow to brown; scutellum yellow with a slender brownish yellow stripe at middle; mediotergite brownish yellow to brown. Thoracic pleuron mostly brown throughout, except prescutum, anepimeron, katepisternum and metakatepisternum partly brownish yellow. Legs: coxae and trochanters brownish yellow with gray setae; femora and tibiae brownish yellow with short brown setae; tarsi brown with brown setae. Wing (Figs 22, 28) pale yellow; stigma and veins brownish yellow. Venation:
Abdomen (Fig. 22) with brownish yellow setae. First two segments more yellowed at lateral margin; segments 3–8 dark brown.
Male terminalia (Figs 22, 29–33) brown with brownish yellow setae. Posterior margin of ninth tergite with a U-shaped notch; gonocoxite large, elongate cylindrical, gently curved; clasper of gonostylus slender, terminal spine decurved; lobe of gonostylus short and stout, swollen with setae at middle; interbase two-layered membranous structure with spine-like apex; aedeagus smaller.
Female (Figs 24–27) resembles male. Thoracic pleuron more brownish yellow. Abdomen plump, dark brown.
Ovipositor (Figs 24–27) short and fleshy, brownish yellow; cercus oval; Hypogynial valve longer.
. India (Assam); China (Xizang).
. This species was known previously only from India. With the present contribution it is recorded from China for the first time.
. 1 male (
. Rostrum is very short; antenna has 6 segments, very long; vertical tubercle is large bulbous. Wing is brownish yellow;
. Male (
Head (Figs 34–35) dark brown with very long abundant brown setae. Rostrum very short, dark brown; palpi brown. Antenna 6-segmented, very long, more than three times as long as wing; scape and pedicel blackish brown with long brown setae; flagellum dark brown with short brown setae. Vertical tubercle large bulbous, dark brown with abundant very long brown setae.
Thorax (Figs 34–35) dark brown with abundant very long brownish yellow setae. Legs: coxae dark brown with abundant very long brownish yellow setae; trochanters brownish yellow with long brownish yellow setae; femora yellow with short brownish yellow setae; tibiae and tarsi brown with short brown setae. Wing (Figs 34, 40) brownish yellow, stigma slightly brown; veins slightly brown, very inconspicuous against the ground. Venation:
Abdomen (Fig. 34) with abundant very long brownish yellow setae. First three segments brown; segments 4–8 dark brown.
Male terminalia (Figs 34, 41–45) brown with long brownish yellow setae. Posterior margin of ninth tergite with a deep U-shaped notch; posterior margin of ninth sternite with a deep V-shaped shallow; gonocoxite large, elongate cylindrical; clasper of gonostylus long and slender, terminal spine decurved; lobe of gonostylus short and stout, swollen with setae at middle; interbase well-developed, a two-layered membranous structure with spine-like apex; aedeagus smaller.
Female (Figs 36–39) resembles male. Thorax more brownish yellow. Abdomen longer, venter more brownish yellow.
Ovipositor (Figs 36–39) elongate, reddish yellow. Cercus narrowed toward tip. Hypogynial valve shorter, narrowed toward tip.
. India (Assam); China (Xizang).
. This species was known previously only from India. This is the first record from China.
. Femora are yellow. Wing is brownish yellow with the following markings: an oblique transverse hyaline marking from
. Male (
Head (Figs 46) brown with long brown setae. Rostrum very short, brownish yellow; palpi brown. Antennal scape brown with brown setae; pedicel brownish yellow; flagellum is broken.
Thorax (Figs 46, 47) brown with long brown setae. Legs: coxae and trochanters brown with long brown setae; femora and tibiae yellow with brown setae; basal two segments of tarsi yellow with brown setae, reminder segments brownish yellow to brown with brown setae. Wing (Figs 46, 48) brownish yellow, anal cells more yellow; anal cells with hyaline markings at base; an oblique transverse hyaline marking from
Abdomen (Fig. 46) with brown setae. Segments 1–5 brown, segments 6–7 dark brown, segment 8 yellow.
Male terminalia (Figs 46, 50–54) yellow with brownish yellow setae. Posterior margin of ninth tergite with two small triangular processes, with abundant brown setae; gonocoxite moderately stubby; clasper of gonostylus slender, terminal spine decurved; lobe of gonostylus short and stout, middle margin swollen with setae; interbase cylindrical, stubby at base; aedeagus longer, apically directed ventrally.
. Unknown.
. China (Xizang).
. The species is named after Xizang Autonomous Region, where the type locality is located.
. This new species is very similar to