CHINA: Sichuan Province, Jinfo Mountain, 30°3'30"N, 103°53'15"E, 1 male, 9.v.1986, light trap, X. Wang. Fujian Province, Wuyi Mountain, 27°43'46"N, 118°1'52"E, 4 males, 28–30.iv.1993, light trap, X. Wang. Guizhou Province, Fanjing Mountain, Huguo Temple, 27°54'43"N, 108°38'35"E, 4 males, 2–4.vii.2001, light trap, R. Zhang.

The species differs from all other Metriocnemus species by the wing chaetotaxy, the characteristic hypopygium with very long, sharply pointed anal point and a gonostylus lacking crista dorsalis. The Chinese specimens has higher antennal ratio (AR = 1.00–1.73) than the Indian specimens (AR = 1.09). Among the specimens of China, one was identified as Metriocnemus hirticollis (Staeger, 1839), which should be Metriocnemus (Metriocnemus) albolineatus (Meigen, 1818) after we re-examined the specimen.

Metriocnemus (Metriocnemus) aculeatus has been recorded from India (Chaudhuri et al. 1989) and the Oriental China.

CHINA: Sichuan Province, Ganzi City, Yajiang County, 29°53'48"N, 103°10'19"E, 1 male, 14.vi.1986, light trap, X. Wang.

The male can be separated from other species of Metriocnemus by having a short virga (23–26 µm long), very weak inferior volsella, rounded to bluntly triangular crista dorsalis, tapering anal point with blunt apex, Sc with 10–31 setae, M with 15–32 setae, and cell m with 35–73 setae. This species is a member of the eurynotus group, but the male can be separated from other species of the group by having a shorter virga and a weaker inferior volsella. It has more setae on the wings than Metriocnemus (Metriocnemus) brusti and Metriocnemus (Metriocnemus) corticalis, but fewer than Metriocnemus (Metriocnemus) eurynotus.

The species is recorded from the Nearctic, Palaearctic and Oriental regions (Ashe and O’Connor 2012). In China it was collected from Sichuan Province in Oriental China for first time.

CHINA: Tibet, Zhangmu, 28°46'26"N, 87°30'22"E, 1 male, 15.viii.1987, light trap, C. Deng. Tibet, Zhangmu, 28°46'26"N, 87°30'22"E, 1 male, 6.ix.1987, light trap, C. Deng.

Metriocnemus (Metriocnemus) beringiensis may be no more than a small form of Metriocnemus (Metriocnemus) fuscipes (Meigen, 1818) differing in having a strongly reduced or absent anal point and slightly fewer setae on squama. Chinese specimens have fewer setae (R with 18–28, R₁ with 18–20, R₄₊₅ with 15–38 setae) on the wing than Norwegian specimens (R with 39–69, 55, R₁ with 27–47, 36, R₄₊₅ with 37–81, 59 setae) (Sæther 1995).

The species is previously recorded from the Nearctic and Palaearctic regions (Ashe and O’Connor 2012). In China it was collected in Tibet in Oriental China for first time.

CHINA: Sichuan Province, Kangding City, Ertaizidaoban, 30°2'20"N, 101°50'6"E, 1 male, 15.vi.1996, water net, X. Wang. Sichuan Province, Litang County, 29°59'45"N, 100°16'11"E, 1 male, 11.vi.1996, light trap, X. Wang.

This species can be separated from other Metriocnemus species by having a total length of 2.18–2.42 mm, wing length of 1.85–2.25 mm, AR = 0.23–0.26, acrostichals in 2 rows, 25–37 dorsocentrals, and reduced anal lobe of the wing. The anal point is 45–48 µm long, and lacking microtrichia in distal half. Virga is 50–53 µm long and consists of a single spine. The inferior volsella is bilobate, and the length of the basal lobe is about half the length of the gonocoxite.

The species is recorded from Russian Far East (Makarchenko and Makarchenko 2004). In China it was collected in Sichuan Province in Oriental China for first time.

CHINA: Hebei Province, Pingquan County, Guangtou Mountain, 41°1'43"N, 118°43'1"E, 1 male, 29.vi.1995, light trap, H. Li. Guizhou Province, Daozhen County, Xiaosha River, 29°10'45"N, 107°32'59"E, 1 male, 25.v.2004, light trap, H. Tang.

According to Sæther (1989), the male can be separated from other members of Metriocnemus by having rounded crista dorsalis, anal point tapering to blunt apex, well sclerotized virga, comparatively sparsely haired wing with about 0–8 setae on Sc, 0–11 on M, 0–14 on PCu and 7–9 setae in cell m, and squama with 27–34 setae. The Chinese specimens have slightly more setae on wing membrane, with about 2–9 setae on Sc, 12–14 on M, 35–48 on PCu and 13–16 setae in cell m, but squama only with 15-17 setae. The species is similar to Metriocnemus (Metriocnemus) albilineatus (Meigen, 1818) and Metriocnemus (Metriocnemus) eurynotus, but has tapering anal point and rounded crista dorsalis. It has a well developed virga as in Metriocnemus (Metriocnemus) corticalis and differs from this species in minor details in the wing chaetotaxy and the hypopygium.

The species is recorded from the Nearctic and Palaearctic regions (Ashe and O’Connor 2012). It was collected in both Oriental and Palaearctic China.

Holotype male (BDN No. 08832), CHINA: Hebei Province, Pingquan County, Guangtou Mountain, 41°1'43"N, 118°43'1"E, 29.vi.1995, light trap, W. Bu. Paratype male (BDN No. 08816), as holotype except the date is 28.vi.1995.

The gonostylus is 83–90 µm long, with short, strong outer projection; crista dorsalis is strong and pointed; LR₁ is high (0.68–0.70); squama with 8–10 setae; and cell m basally of RM with 15 setae.

From Latin, calcaneum meaning the heel, referring to the short, strong outer projection on gonostylus. The species epithet is a noun in apposition.

Male (n = 2).

Total length 2.49–2.68 mm. Wing length 1.68–1.88 mm. Total length / wing length 1.43–1.48. Wing length / length of profemur 2.09–2.23.

Coloration. Head and abdomen brown, thorax and legs yellow.

Head. AR 1.43–1.58. Temporal setae 11, including 4 inner verticals, 3 outer verticals, and 4 postorbitals. Clypeus with 10–12 setae. Tentorium 123–150 µm long, 18–20 µm wide. Stipes 105–108 µm long, 25–40 µm wide. Palp segments lengths (in µm): 18–40, 43, 135–155, 105–118, 153–165. Length ratio of palpomere 5/3 1.06–1.13.

Wing (Fig. 1). VR 1.16–1.34. Costal extension 110–150 µm long. Brachiolum with 1 seta, C extension with 8 non–marginal setae, Sc with 2–3, R with 18–19, R₁ with 16–17, R₄₊₅ with 25–32, RM with 1, M with 0–2, M₁₊₂ with 26, M₃₊₄ with 20, Cu with 0, Cu₁ with 7 setae. Pcu and An without setae. Wing membrane with setae in most cells, with 15 setae in cell m basally of RM, cell r₄₊₅ with 74–105, cell m₁₊₂ with 108–135, cell m₃₊₄ with 21–38 setae. Squama with 8–10 setae.

Thorax. Antepronotum with 1–2 setae. Dorsocentrals 10–12, acrostichals 8–9, prealars 5. Scutellum with 7–8 setae.

Legs. Spur of fore tibia 53–75 µm long, spurs of mid tibia 33–35 µm and 25–28 µm long, of hind tibia 53–58 µm and 28 µm long. Width at apex of fore tibia 38–43 µm, of mid tibia 35–43 µm, of hind tibia 45–50 µm. Comb of 12 setae, shortest 20–23 µm long, longest 50–63 µm long. First tarsomere of mid leg with 1 pseudospur, 20 µm long; hind leg without pseudospurs. Lengths (in µm) and proportions of legs as in Table 1.

Hypopygium (Figs 2–3). Anal point proper 30–45 µm long, 23–25 µm wide, tapering from base to pointed apex; with 8–11 setae at base on tergite IX. Laterosternite IX with 10–13 setae. Phallapodeme 48–53 µm long; transverse sternapodeme 110–133 µm long. Gonocoxite 223–224 µm long. Gonostylus 83–90 µm long, with short, strong outer projection; crista dorsalis strong and pointed; megaseta 13 µm long. HR 2.49–2.70. HV 2.76–3.24.

The specimens were collected in Hebei Province in Palaearctic China.

CHINA: Qinghai Province, Menyuan County, Haibei Station, 37°22'33"N, 101°37'20"E, 3 males, 12.vii.1989, light trap, M. Wei.

This species apparently forms the sister species of Metriocnemus ursinus (Holmgren, 1869). It can be separated from Metriocnemus (Metriocnemus) ursinus on its smaller size, by having only 27 setae in cell r₄₊₅, only 26 setae on scutellum, and the presence of pseudospurs on fore metatarsus (Sæther 1995). Compare to the holotype, the measurements of the two more males are very similar, except only 8-15 setae on scutellum.

The species was described by Sæther (1995) in Qinghai Province in Palaearctic China based on a single male specimen. Later two more male slides have been made which collected in the same location as the holotype.

CHINA: Fujian Province, Wuyi Mountain, 27°43'46"N, 118°1'52"E, 1 male, 28.iv.1993, light trap, X. Wang.

This species can be separated from other species of Metriocnemus by having a slender gonostylus with long, low crista dorsalis; a robust, long anal point; and an AR of 1.0–1.5. The Chinese specimen has a slightly higher 5^th/3^rd palp ratio (0.79–0.94) than the Norwegian specimens (0.70). Further, the Chinese specimen has 2 pseudospurs, 24–32 µm long, on tarsomere 1 and 1 pseudospur, 20–28 µm long on tarsomere 2 of mid and hind legs, while the Norwegian specimens have 1 pseudospur, 23–38 µm long, on tarsomere 1 of mid and hind legs only.

The species was described from Norway by Sæther (1995). In China it was collected in Fujian Province in Oriental China.

Holotype (ZMB No.145): CHINA: Tibet, Dingri, Chang Street, 28°39'31"N, 87°7'34"E, 1 male, 16.ix.1987, light trap, C. Deng.

The species is similar to Metriocnemus (Metriocnemus) brusti Sæther, 1989 and Metriocnemus (Metriocnemus) acutus Sæther, 1995 but can be separated on having 20 setae on vein M, an AR = 1.43, palp with a small apical tooth on each of palpomeres 3 and 4, anal point with concave margins and details of the hypopygium. Metriocnemus (Metriocnemus) brusti only have 0–14 setae and Metriocnemus (Metriocnemus) acutus without setae on vein M.

The species is known only from Tibet in Oriental China by Sæther (1995).

CHINA: Gansu Province, Yuzhong County, 35°50'35"N, 104°6'45"E, 1 male, 8.viii.1993, light trap, X. Wang. Sichuan Province, Jinfo Mountain, 30°3'30"N, 103°53'15"E, 1 male, 9.v.1986, light trap, X. Wang.

The male can be recognized on the completely parallel–sided anal point with broad, rounded apex; and the sharply triangular crista dorsalis.

The species is recorded from the Nearctic, Palaearctic and Oriental regions (Ashe and O’Connor 2012). The species has been collected in both Oriental and Palaearctic China.

CHINA: Ningxia Hui Autonomous Region, Liupan Mountain, 35°47'22"N, 106°17'36"E, 1 male, 4.viii.1987, light trap, W. Wang. Liaoning Province, Changbai Mountain, 41°2'40"N, 122°37'38"E, 1 male, 1.v.1994, light trap, X. Wang. Tibet, Yadong County, 27°29'5"N, 88°54'25"E, 1male, 29.viii.2003, light trap, H. Xue.

This species is easily recognized by the lack of virga, pointed anal point, low inferior volsella with apical hump, LR₃ only 0.38–0.39 and AR = 0.9–1.2 (Sæther 1989). The Chinese specimens have a slightly higher AR (1.28–1.42) than that given by Sæther (1989) (AR = 0.86–1.17).

The species is recorded from the Nearctic and Palaearctic regions (Ashe and O’Connor 2012). In China the species was collected in Palaearctic China.

CHINA: Hubei Province, Enshi Tujia and Miao Autonomous Prefecture, He Mountain, Fenshuiling, 29°53'24"N, 110°2'1"E, 2 males, 12–16.vii.1999, light trap, B. Ji. Hubei Province, Enshi Tujia and Miao Autonomous Prefecture, Xianfeng County, Pingba, 29°24'57"N, 109°8'18"E, 2 males, 20.vii.1999, light trap, B. Ji. Liaoning Province, Changbai Mountain, 41°2'40"N, 122°37'38"E, 2 males, 1.v.1994, light trap, X. Wang. Sichuan Province, Daocheng County, Sangdui, 29°11'28"N, 100°6'32"E, 1 male, 13.vi.1996, light trap, X. Wang.

The male imago combines a well developed virga with a low crista dorsalis, weak anal point, and low inferior volsella typical of the fuscipes group. The species has an AR = 1.78–2.42.

The species is recorded from the Nearctic and Palaearctic regions (Ashe and O’Connor 2012). It is known from both Oriental and Palaearctic China for first time.

CHINA: Jilin Province, Changbai Mountain, 41°2'40"N, 122°37'38"E, 1 male, 7.vii.1986, light trap, X. Wang. Yunan Province, Songhua County, 25°11'38"N, 109°8'18"E, 1 male, 1.vi.1996, light trap, B. Wang. Hebei Province, Pingquan County, Guangtou Mountain, 41°1'43"N, 118°43'1"E, 1 male, 29.vi.1995, light trap, H. Li. Sichuan Province, Daocheng County, Sangdui, 29°11'28"N, 100°6'32"E, 2 males, 13.vi.1996, light trap, X. Wang. Hubei Province, Deduo Mountain, Fenshui ling, 29°40'8"N, 109°5'12"E, 1 male, 16.vi.1999, light trap, B. Ji.

The Chinese specimens have a low number of setae on each of subcosta (0–9, 2) and M (4–20, 12), combined with a high AR (1.89–2.90, 2.24) and LR₃ (0.44–0.50, 0.46), and a conspicuously long spur of the fore tibia (2.0–2.4 times as long as the apical width of tibia), these characters will distinguish the species from other members of Metriocnemus. Metriocnemus wittei Freeman, 1955 from Africa might be a synonym (Sæther 1995).

The species is recorded from the Nearctic, Palaearctic and Oriental regions (Ashe and O’Connor 2012). It has been collected in both Oriental and Palaearctic China.

CHINA: Sichuan Province, Daocheng City, Sangdui County, 29°11'28"N, 100°6'32"E, 1 male, 11.vi.1996, sweep net, X. Wang. Yunnan Province, Dali County, Yinqiao, 25°45'10"N, 109°5'12"E, 1 male, 21.v.1996, light trap, B. Wang. Xinjiang Uygur Autonomous Region, Yining City, Saimuli Lake, 44°37'26"N, 81°12'28"E, 1 male, 30.vii.2000, light, trap, N. Tang.

The species has an AR = 1.13; very long palp; wing with numerous macrotrichia; ta₁ and ta₂ of mid and hind leg each with 2 pseudospurs; virga composed of nearly 20 spines; anal point robust, partly parallel–sided; a strongly projecting, rectangular inferior volsella in basal half of the gonocoxite; and a triangular, preapical crista dorsalis.

The species was described from Japan (Sasa 1983), and it is a newly recorded in China. It is known from both Oriental and Palaearctic China.

CHINA: Zhejiang Province, Qingyuan City, Baishanzu County, 27°43'51"N, 100°7'33"E, 2 males, 18–22.iv.1994, light trap, H. Wu.

The species has an AR = 1.2, very low inferior volsella, and weak anal point. Basal half of the wing membrane is bare, costa is strongly produced, and the distance C–M is rather less than M–Cu. The palp is unusually short, palpomeres 3 and 4 are less than three times as long as broad, palpomere 2 is rather longer. Wang (2000) recorded Metriocnemus gracei Edwards, 1929 from China, which should be Metriocnemus (Metriocnemus) tristellus Edwards after we re-examined the specimen.

The species is recorded from the Nearctic and Palaearctic regions (Ashe and O’Connor 2012).The species has been collected in Oriental China for first time.

CHINA: Tibet, Zhangmu, 28°46'26"N, 87°30'22"E, 1 male, 7.ix.1987, light trap, C. Deng. Tibet, Zhangmu, 28°46'26"N, 87°30'22"E, 1 male, 21.ix.1987, light trap, C. Deng. Tibet, Zhangmu, 28°46'26"N, 87°30'22"E, 1 male, 9.viii.1987, light trap, C. Deng. Guizhou Province, Fanjing Mountain, Huguo Temple, 27°54'43"N, 108°38'35"E, 1 male, 4.viii.2001, light trap, R. Zhang. Fujian Province, Wuyi Mountain, Tongmu County, 27 °43’ 46"N, 118°1'52"E, 2 males, 29.iv.1993, sweep net, W. Bu.

This species can be separated from other Metriocnemus species by the following combination of characters: acrostichals 4–5, uniserial; scutellum with 12 irregularly arranged setae; squama with 7 setae; anal point narrow and pointed with 14 setae at base, and gonocoxite with a small, dorsal, flap–like setose lobe. The specimens from Tibet have a lower antennal ratio (AR = 0.66–0.88) than the Indian specimens (AR = 1.03).

This species was described from India (Chaudhuri et al. 1989). It has been collected in both Oriental and Palaearctic China.

CHINA: Sichuan Province, Jinfo Mountain, 30°3'30"N, 103°53'15"E, 2 males [holotype / paratype], 10.v.1986, light trap, X. Wang.

We examined the holotype and paratype specimens which are described by Sæther (1995) from China. According to Sæther (1995), the male can be separated from all other members of the euryotus group except Metriocnemus (Metriocnemus) albolineatus by the short virga (about 26 µm long), subcosta with 42–70 setae, and cell m with 113–144 setae. The species is close to Metriocnemus (Metriocnemus) albolineatus sharing the short virga and general wing chaetotaxy. It differs from Metriocnemus (Metriocnemus) albolineatus by having an AR = 0.5–0.6 and a much shorter anal point.

This species was only described from Oriental China by Sæther (1995).