Subgenus Microchelonus Szépligeti, 1908 s. str.

Diagnosis. Body small-sized; head transverse; antennomeres of female 16; eye sparsely setose; frons and vertex striate-rugose; face flat, striate-rugose to reticulate-rugose; clypeus often finely punctate, with distinct setosity and shiny; mesoscutum and scutellum evenly convex; propodeum coarsely rugose; vein 1-SR+M of fore wing absent; hind coxa, femur and apex of tibia robust; metasomal carapace of male with medium-sized apical opening, carapace apically usually rounded in dorsal view, rarely narrowed posteriorly.

Biology. Parasitoids of Argyresthiidae, Batrachedridae, Blastobasidae, Coleophoridae, Cosmopterigidae, Gelechiidae, Momphidae, Noctuidae, Pyralidae, Sesiidae, Tortricidae, and Yponomeutidae . (Yu et al. 2016).

Distribution. Worldwide (Yu et al. 2016).

Notes. One species reported from China is actually a junior homonym and, therefore, here renamed: Chelonus (Microchelonus) jiae nom. nov. for C. (M.) bimaculatus (Chen & Ji, 2003) not C. bimaculatus Szépligeti, 1896 or C. bimaculatus Ivanov, 1899 . A second species, C. (M.) tobiasi (Yuldashev, 2011) is a junior synonym of C. (M.) tobiasi (Zhang, Shi, He & Chen, 2008), and, therefore, here renamed to C. (M.) substernatus nom. nov.

Key to species of subgenus Microchelonus Szépligeti from China

1 Females; [unknown of C. scirpophagae, but in other species, the face is either smooth and very shiny (Fig. 72G) or very finely reticulate-rugose and with satin sheen].................................................................... 2

- Males............................................................................................. 41

2 Body reddish brown (Fig. 69); [penultimate antennomere rather slender, 3.0 × its width (Fig. 70H); parastigma yellowish (Fig. 70A).......................................................................... C. (M.) ruficorpus sp. nov.

- Body black or dark brown (Figs 5, 9, 15, 19, 29, 45).......................................................... 3

3 Apical margin of clypeus with two teeth (Fig. 46F); [posterior excavation of head very deep (> 35%); temples strongly narrowed behind eyes in dorsal view (Fig. 46G)]........................................ C. (M.) lukasi van Achterberg, 2004

- Apical margin of clypeus without teeth, convex, truncate or sinuous (Figs 6G, 10G, 16G, 20F, 30F, 56F, 66F)............ 4

4 Apex of metasomal carapace with a large median protuberance in posterior view (Fig. 16F); [pterostigma large and slightly protruding, its length 2.2 × width]..................................................... C. (M.) bullatus sp. nov.

- Apex of metasomal carapace without protuberance........................................................... 5

5 Metasomal carapace in lateral view medio-posteriorly with a depression (Fig. 66D); [vein SR1 of fore wing slightly curved outwards (Fig. 66A)]............................................................... C. (M.) recavus sp. nov.

- Metasomal carapace in lateral view rounded or slightly truncate (Figs 6D, 10D, 20D, 30D, 56D)...................... 6

6 Metasomal carapace in lateral view posteriorly bag-like, apex of carapace distinctly incurved ventrally (Fig. 56D); [vein r of fore wing curved (Fig. 56A); eyes rather converging ventrally (Fig. 56F)].................. C. (M.) milkoi (Tobias, 2003)

- Carapace less bag-like posteriorly and apex usually less incurved (Figs 6D, 10D, 20D, 30D).......................... 7

7 Metasomal carapace medio-apically shallowly emarginate in posterior view; [legs brownish yellow, only apices of hind tibia and 5 th segment of all tarsi are dark-coloured.].................................. C. (M.) elegantulus (Tobias, 1986) .

- Metasomal carapace without apically emargination in posterior view............................................ 8

8 Apex of metasomal carapace with a longitudinal depression ventrally (Figs 111F, 113F)............................. 9

- Apex of metasomal carapace without depression ventrally.................................................... 10

9 Legs almost entirely light yellow (Fig. 110); no protrusion under postero-ventral depression of carapace (Fig. 111F); metasomal carapace irregularly and coarsely reticulate-rugose (Fig. 111E)............. C. (M.) rhagius Zhang, Shi, He & Chen, 2008

- Most of legs dark brown (Fig. 112); a small protrusion present under postero-ventral depression of caarapace (Fig. 113F); metasomal carapace rather coarsely reticulate-rugose (Fig. 113E)............ C. (M.) tobiasi Zhang, Shi, He & Chen, 2008

10 Metasomal carapace in dorsal view more narrowed to apex, width at 3/4 of carapace: width at 1/4 of carapace <0.95 × (Figs 20E, 30E).......................................................................................... 11

- Metasomal carapace in dorsal view less narrowed apically, widest at or behind middle of carapace (Figs 6E, 10E, 12E, 34E). .................................................................................................. 13

11 Mesosoma short in lateral view, its length only 1.2 × its height; [with smoothed sculpture on narrowed part of carapace, shiny]...................................................................... C. (M.) volgensis Tobias, 1986

- Mesosoma rather long in lateral view, length> 1.2 × its height (Figs 20B, 30B)................................... 12

12 Vein r of fore wing longer than vein 3-SR; length of marginal cell 1.2 × its width (Fig. 20A); posterior excavation of head deep (Fig. 20G); middle part of scutellum densely punctate (Fig. 20C).............................. C. (M.) clivus sp. nov.

- Vein r of fore wing shorter than vein 3-SR; length of marginal cell 1.75 × its width (Fig. 30A); posterior excavation of head shallow (Fig. 30G); middle part of scutellum smooth (Fig. 30C)............................. C. (M.) erugatus sp. nov.

13 Carapace tapering from apex to base in dorsal view, width at 3/4 of carapace: width at 1/4 of carapace> 1.15 × in dorsal view (Figs 12E, 34E)...................................................................................... 14

- Metasomal carapace in dorsal view gradually widened, width at 3/4 of metasoma: width at 1/4 of metasoma 0.95–1.15 × (Figs 6E, 10E, 42E, 52E, 58E, 86E).......................................................................... 15

14 Length of apex and penultimate antennomeres 1.5 × and 0.9 × their width, respectively (Fig. 12H); vein 3-SR of fore wing oblique, almost in line with vein r; fore wing entirely dark brown, opaque (Fig. 12A)....... C. (M.) alveatus (Tobias, 1989)

- Apex of flagellum and penultimate segment rather long, 4.0 × and 3.0 × their width, respectively (Fig. 34H); vein r of fore wing forms an angle with 3-SR and vein 3-SR nearly horizontal (Fig. 34A).................. C. (M.) flagellaris (Tobias, 1989)

15 Vein 1-R1 of fore wing 0.5 × pterostigma, length of marginal cell 1.2–1.3 × width (Figs 58A, 86A)................... 16

- Vein 1-R1 of fore wing longer than 0.5 × pterostigma (Figs 6A, 10A, 42A, 52A).................................. 18

16 Legs reddish-yellow and scapus yellowish; apical margin of clypeus truncate......... C. (M.) chryspedes (Ji & Chen, 2003)

- Legs and scapus all dark (Figs 57, 58F); apical margin of clypeus convex (Figs 58F, 86F)........................... 17

17 Vein r of fore wing distinctly curved (Fig. 86A); temples widened behind eyes in dorsal view (Fig. 86G)............................................................................................. C. (M.) zaitzevi (Tobias, 1972)

- Vein r straight (Fig. 58A); temples strongly narrowed behind eyes in dorsal view (Fig. 58G)................................................................................................... C. (M.) moskovitus (Tobias, 1997)

18 Temple strongly narrowed behind eyes (Figs 42G, 52G)...................................................... 19

- Temple almost parallel-sided behind eyes (Figs 6G, 10G, 14G, 38G, 50G, 62G, 74G, 78G).......................... 20

19 Fore wing entirely dark brown, opaque and parastigma yellowish (Fig. 42A); ventral margin of clypeus convex (Fig. 42F)................................................................................. C. (M.) linzhiensis sp. nov.

- Fore wing semitransparent and parastigma dark brown (Fig. 52A); ventral margin of clypeus truncate (Fig. 52F).................................................................................... C. (M.) melanochromus sp. nov.

20 Basal half of antennomeres yellow and more distal antennomeres brown (Figs 14I, 78I)............................ 21

- All antennomeres brown or dark brown (Figs 6H, 10I, 14I, 38H, 50H, 62H, 74H)................................. 23

21 Metasomal carapace in lateral view rounded (Fig. 78D); [vein r of fore wing longer than vein 3-SR; vein SR1 straight (Fig. 78A)]......................................................................... C. (M.) staurorhytis sp. nov.

- Metasomal carapace in lateral view slightly truncate (Fig. 14D)................................................ 22

22 Vein SR1 of fore wing straight; lateral teeth of propodeum distinct and strong.... C. (M.) daanyuanensis (Chen & Ji, 2003)

- Vein SR1 curved outwards (Fig. 14A); lateral teeth of propodeum weak and small (Fig. 14C)................................................................................................... C. (M.) brachykeraiatus sp. nov.

23 Vein r of fore wing longer than vein 3-SR (Fig. 74A)........................................................ 24

- Vein r of fore wing shorter than vein 3-SR (Figs 10A, 50A) or about as long (Figs 6A, 38A, 62A).................... 26

24 Vein r of fore wing distinctly thickened (Fig. 74A); [legs and scapus all dark brown or blackish (Figs 73, 74E)].................................................................................... C. (M.) semilunaris (Tobias, 2000)

- Vein r of fore wing not thickened........................................................................ 25

25 OOL as long as POL, median ocellus almost in line with lateral ocelli; legs dark brown.... C. (M.) equalis (Chen & Ji, 2003)

- OOL more or less longer than POL, ocelli forming a distinct triangle; legs pale... C. (M.) longidiastemus (Ji & Chen, 2003)

26 Apical margin of clypeus sinuous, shallowly excised medially and slightly protruding (Figs 6F, 62F).................. 27

- Apical margin of clypeus convex or truncate and distinctly protruding ventrally (Figs 10F, 38F, 50F).................. 28

27 Frons coarsely striate-rugose (Fig. 6G); parastigma yellowish (Fig. 6A)...................... C. (M.) adiazetos sp. nov.

- Frons finely striate-rugose (Fig. 62G); parastigma dark brown (Fig. 62A)..................... C. (M.) platyetrus sp. nov.

28 Vein r of fore wing curved (Figs 10A, 38A, 50A)........................................................... 29

- Vein r of fore wing straight............................................................................. 32

29 Base of metasomal carapace with oblique rugae.................................. C. (M.) obliquis (Ji & Chen, 2003)

- Base of metasomal carapace longitudinally rugose.......................................................... 30

30 Parastigma and scapus dark brown (Fig. 38F)..................................... C. (M.) insidiatrix (Tobias, 1989)

- Parastigma and scapus pale, yellowish brown (Figs 10F, 50F)................................................. 31

31 Posterior excavation of head deep (Fig. 10G); apical margin of clypeus convex medio-ventrally (Fig. 10F)........................................................................................ C. (M.) alticinctus (Tobias, 1989)

- Posterior excavation of head shallow (Fig. 50F); apical margin of clypeus truncate medio-ventrally (Fig. 50F); [base of metasomal carapace with a yellow band and a yellow spot at middle (Fig. 50E)]........... C. (M.) maculovittatus sp. nov.

32 Vein 3-SR of fore wing oblique, almost in line with vein r.................................................... 33

- Vein r of fore wing forms an angle with vein 3-SR and vein 3-SR nearly horizontal................................ 36

33 Base of metasomal carapace with a yellow band and apical 3/5 reddish brown........ C. (M.) alternator (Ji & Chen, 2003)

- Apical 3/5 of carapace black........................................................................... 34

34 Frons smooth; 3 rd and penultimate antennomeres 5.0 × and 2.0 × their width, respectively.................................................................................................. C. (M.) glabrifrons (Chen & Ji, 2003)

- Frons striate-rugose; length of 3 rd and penultimate antennomeres <4.0 × and <1.5 × its width, respectively............. 35

35 Apical margin of clypeus sinuous; lateral teeth of propodeum weak and small; carapace entirely black.......................................................................................... C. (M.) jilinensis (Chen & Ji, 2003)

- Apical margin of clypeus truncate; lateral teeth of propodeum distinct and strong; base of metasomal carapace with a yellow medial spot............................................................. C. (M.) fujianensis (Ji & Chen, 2003)

36 Hind femur densely and long setose........................................... C. (M.) longihair (Chen & Ji, 2003)

- Hind femur rather sparsely setose....................................................................... 37

37 Vein r of fore wing, 0.5 × as long as vein 3-SR................................. C. (M.) breviradis (Chen & Ji, 2003)

- Vein r slightly shorter than vein 3-SR or of equal length...................................................... 38

38 Apical margin of clypeus truncate; fore wing entirely dark brown, opaque........ C. (M.) pectinophorae (Cushman, 1931)

- Apical margin of clypeus convex; fore wing semitransparent.................................................. 39

39 Palpi black; [metasomal carapace with an irregularly edged yellow band]............ C. (M.) nigripalpis (Chen & Ji, 2003)

- Palpi yellowish or yellowish brown...................................................................... 40

40 Vein SR1 of fore wing curved; carapace with a yellow medial spot basally............... C. (M.) chinensis (Zhang, 1984)

- Vein SR1 of fore wing straight; metasomal carapace entirely black...................... C. (M.) rokkina (Sonan, 1932)

41 Face either smooth and very shiny (Fig. 72G) or very finely reticulate-rugose and with satin sheen; apical aperture in posterior view very large and 2.4 × wider than high, elongate, broadly slit-shaped, in lateral view wide triangular up to apical 1/4 metasoma (Fig. 72D)........................................................... C. (M.) scirpophagae sp. nov.

- Face finely rugose and with satin sheen (Figs 8G, 26G, 28H, 36G); apical aperture of metasoma in lateral view hardly or not visible (Figs 8D, 26D, 28D, 36D)....................................................................... 42

42 Mesosoma slender in lateral view, its length 1.7–1.9 × height (Figs 8B, 36B); length of carapace in lateral view> 3.0 × its maximum height, rather flat (Figs 8D, 36D)............................................................... 43

- Mesosoma robust in lateral view, its length less than 1.5 × its height (Figs 26B, 28B, 40B, 44B); length of carapace in lateral view less than 3.0 × its maximum height, more or less widened posteriorly (Figs 26D, 28D, 40D, 44D)................ 44

43 Metasomal carapace in dorsal view slightly widened (Fig. 8E); ventral opening of carapace reaching apex of carapace (Fig. 8D).............................................................................. C. (M.) aequus sp. nov.

- Metasomal carapace in dorsal view parallel-sided (Fig. 36E); apex of carapace distinctly incurved ventrally (Fig. 36D)........................................................................................ C. (M.) illatus sp. nov.

44 Metasomal carapace in lateral view posteriorly rather bag-like, apex of carapace distinctly incurved ventrally (Fig. 28D); [apical aperture in posterior view, with parallel upper and lower edges, slit-shaped (Fig. 28G)]..... C. (M.) cyclotus sp. nov.

- Carapace less bag-like posteriorly and apex usually less incurved (Figs 26D, 40D, 44D, 48D)........................ 45

45 Apical margin of clypeus with two teeth (Fig. 48G); [apical aperture in posterior view reddish brown (Fig. 48F)]................................................................................. C. (M.) lukasi van Achterberg, 2004

- Apical margin of clypeus without teeth, convex, truncate or sinuous (Figs 18G, 26G, 40G, 44G)...................... 46

46 Apical aperture in posterior view elongate, slit-shaped (width: height ratio> 3.5 ×) (Figs 26F, 54F, 64F)............... 47

- Apical aperture in posterior view oval or round (width: height ratio <3.5 ×) (Figs 18F, 40F, 44F, 60F)................. 57

47 Parastigma and scapus black (Figs 54A, 54G); temple strongly narrowed behind eyes (Fig. 54H)................................................................................................ C. (M.) melanochromus sp. nov.

- Parastigma and scapus pale, yellowish brown or brown (Figs 26A, 26G, 64A, 64G); temple almost parallel-sided behind eyes (Figs 26H, 64H)..................................................................................... 48

48 Legs dark brown or black.............................................................................. 49

- Legs yellowish brown................................................................................. 52

49 Vein r of fore wing shorter than vein 3-SR................................................................. 50

- Vein r of fore wing as long as vein 3-SR.................................................................. 51

50 Metasomal carapace in dorsal view short and wide (Fig. 26E); posterior excavation of head shallow (Fig. 26H)........................................................................................ C. (M.) crassitibialis sp. nov.

- Metasomal carapace in dorsal view rather elongate (Fig. 64E); posterior excavation of head deep (Fig. 64H)............................................................................................. C. (M.) platyetrus sp. nov.

51 Vein SR1 of fore wing curved; carapace with a pair of yellowish lateral spots...... C. (M.) pectinophorae (Cushman, 1931)

- Vein SR1 of fore wing straight; carapace entirely black.............................. C. (M.) lunari (Chen & Ji, 2003)

52 Pterostigma 2.6 × longer than wide; apical margin of clypeus sinuous, shallowly excised medially.......................................................................................... C. (M.) cratospilumi (Ji & Chen, 2003)

- Pterostigma longer than 3.3 × its width; apical margin of clypeus convex or truncate................................ 3

53 Apical margin of clypeus sinuous, shallowly excised medially; [vein 3-SR of fore wing almost in line with vein r; length of 3 rd antennomere 4.0–4.3 × its width]............................................. C. (M.) jilinensis (Chen & Ji, 2003)

- Apical margin of clypeus truncate or convex............................................................... 54

54 Apical margin of clypeus truncate....................................................................... 55

- Apical margin of clypeus convex........................................................................ 56

55 Middle part of scutellum smooth and shiny; vein r of fore wing longer than vein 3-SR; length of 3 rd antennomere 3.5 × its width.................................................................. C. (M.) plainifacis (Chen & Ji, 2003)

- Middle part of scutellum rugose and matt; vein r of fore wing as long as 3-SR; length of 3 rd antennomere 2.9 × its width.......................................................................... C. (M.) amaculatus (Chen & Ji, 2003)

56 Lateral teeth of propodeum small and weak; penultimate antennomere 3.5 × its width; carapace entirely black................................................................................... C. (M.) alternator (Ji & Chen, 2003)

- Lateral teeth of propodeum distinct and strong; penultimate antennomere 1.7–2.0 × its width; carapace with a large yellow medial spot............................................................. C. (M.) fujianensis (Ji & Chen, 2003)

57 Vein 1-R1 distinctly shorter than pterostigma, 0.5–0.7 × pterostigma length (Figs 18A, 60A, 68A, 88A)................ 58

- Vein 1-R1 of fore wing slightly shorter or longer than pterostigma (Figs 22A, 32A, 40A, 44A, 76A, 80A, 82A, 84A)..... 63

58 Temples slightly widened behind eyes in dorsal view (Fig. 88H); apical margin of clypeus convex (Fig. 88G)......................................................................................... C. (M.) zaitzevi (Tobias, 1972)

- Temples parallel-sided or narrowed behind eyes in dorsal view (Figs 18H, 60H, 68H); apical margin of clypeus truncate (Figs 18G, 60G, 68G)..................................................................................... 59

59 Vein r of fore wing longer than vein 3-SR (Fig. 68A); posterior excavation of head deep (Fig. 68H). C. (M.) recavus sp. nov.

- Vein r of fore wing shorter (Fig. 18A) or as long as vein 3-SR (Fig. 60A); posterior excavation of head shallow (Figs 18H, 60H).............................................................................................. 60

60 Vein r of fore wing 0.5 × vein 3-SR; length of 3 rd antennomere 4.3 × its width........ C. (M.) breviradis (Ji & Chen, 2003)

- Vein 1-R1 of fore wing 0.9–1.0 × vein 3-SR; length of 3 rd antennomere <3.5 × its width (Figs 18A, 60A).............. 61

61 Legs yellowish to yellowish brown; metasomal carapace with u-shaped yellowish spot................................................................................................. C. (M.) longipedicellus (Ji & Chen, 2003)

- Legs black to dark brown (Figs 17, 59); carapace entirely black (Figs 18E, 60E).................................. 62

62 Parastigma of fore wing dark brown (Fig. 60A); temples distinctly narrowed behind eyes in dorsal view (Fig. 60H)................................................................................ C. (M.) moskovitus (Tobias, 1997)

- Parastigma of fore wing yellowish brown (Fig. 18A); temples parallel-sided behind eyes in dorsal view (Fig. 18H).................................................................................. C. (M.) calcaratus (Tobias, 1989)

63 Coxa and femora mainly black, blackish brown or brown (Figs 31, 39, 43, 75, 79, 81, 83)........................... 64

- Coxae and femora yellowish or reddish brown (only hind femur more or less darkened) (Fig. 21)..................... 75

64 Vein r of fore wing longer than vein 3-SR (Figs 76A, 82A)................................................... 65

- Vein r of fore wing about as long as vein 3-SR (Figs 32A, 40A, 44A, 80A, 84A).................................. 70

65 OOL as long as POL, median ocellus almost in line with lateral ocelli; carapace tapering from apex to base in dorsal view, width at 3/4 of carapace: width at 1/4 of carapace> 1.15 × in dorsal view.................... C. (M.) equalis (Chen & Ji, 2003)

- OOL more or less longer than POL, ocelli form a triangle (Figs 76H, 82H); metasomal carapace in dorsal view gradually widened, width at 3/4 of metasoma: width at 1/4 of metasoma 0.95–1.15 × (Figs 76E, 82E)......................... 66

66 Antenna filiform, length of 3 rd and penultimate antennomeres 3.5 × and 1.0 × their width, respectively; posterior excavation of head deep............................................................. C. (M.) concentralis (Chen & Ji, 2003)

- Antenna slightly widened medially, length of 3 rd and penultimate antennomeres <3.5 ×, <2.0 × its width (Fig. 76I); posterior excavation of head shallow (Figs 76H, 82H)............................................................... 67

67 Vein r of fore wing distinctly curved (Fig. 76A)............................................................ 68

- Vein r of fore wing straight (Fig. 82A).................................................................... 69

68 Veins r, 2-SR, 3-SR and 2-M conspicuously widened and swollen; apical margin of clypeus truncate......................................................................................... C. (M.) swellinervis (Chen & Ji, 2003)

- Veins r, 2-SR, 3-SR and 2-M of almost same width, not swollen (Fig. 76A); apical margin of clypeus convex (Fig. 76G)............................................................................ C. (M.) semilunaris (Tobias, 2000)

69 Parastigma dark brown; apical margin of clypeus convex (Fig. 82A)................... C. (M.) temporalis (Tobias, 1986)

- Parastigma yellowish; apical margin of clypeus truncate.......................... C. (M.) sinuosus (Ji & Chen, 2003)

70 Scapus yellowish (Fig. 80G)........................................................................... 71

- Scapus black or dark brown (Figs 32G, 40G, 44G, 84G)..................................................... 72

71 Apical margin of clypeus convex (Fig. 80G); posterior excavation of head deep (Fig. 80H)..... C. (M.) staurorhytis sp. nov.

- Apical margin of clypeus truncate; posterior excavation of head shallow......................... C. (M.) jiae nom. nov.

72 Apical aperture of metasoma in lateral view shallow (Fig. 44F); vein 3-SR of fore wing almost in line with vein r and oblique (Fig. 44A)...................................................................... C. (M.) linzhiensis sp. nov.

- Apical aperture of metasoma in lateral view rather wide and occupying 1/10 of metasoma (Figs 32D, 84D); vein r of fore wing forms an angle with 3-SR and vein 3-SR nearly horizontal (Figs 32A, 40A, 84A).................................. 73

73 Clypeus densely setose; apical margin of clypeus convex (Fig. 40G); metasoma in dorsal view less narrowed apically and widest in or behind middle of carapace (Fig. 40E).......................................... C. (M.) leious sp. nov.

- Clypeus hardly setose; apical margin of clypeus truncate (Figs 32G, 84G); metasoma in dorsal view distinctly narrowed subapically (Figs 32E, 84E)............................................................................ 74

74 Posterior excavation of head deep; temple almost parallel-sided behind eyes (Fig. 84H); middle part of scutellum densely punctate (Fig. 84C)............................................................. C. (M.) varus (Tobias, 2000)

- Posterior excavation of head shallow; temples widened behind eyes in dorsal view (Fig. 32H); middle part of scutellum smooth (Fig. 32C)........................................................................ C. (M.) erugatus sp. nov.

75 Vein r of fore wing distinctly curved (Fig. 22A)............................................................ 76

- Vein r of fore wing straight............................................................................. 80

76 Frons smooth; vein 3-SR of fore wing almost in line with vein r.................. C. (M.) glabrifrons (Chen & Ji, 2003)

- Frons striate-rugose (Fig. 22H); vein r of fore wing forms an angle with 3-SR (Fig. 22A)........................... 77

77 Vein r of fore wing longer than vein 3-SR (Fig. 22A); carapace in lateral view declivous posteriorly (Fig. 22D).............................................................................................. C. (M.) clivus sp. nov.

- Vein r of fore wing about as long as or shorter than vein 3-SR; carapace in lateral view more rounded posteriorly........ 78

78 Base of metasomal carapace with oblique rugae; carapace with pale yellowish basal band. C. (M.) obliquis (Ji & Chen, 2003)

- Vein r of fore wing about as long as or shorter than vein 3-SR; carapace in lateral view more rounded posteriorly; carapace with an medial spot or a pair of yellowish lateral spots........................................................... 79

79 Apical margin of clypeus convex; length of 3 rd antennomere about 3.6 × its width; lateral teeth of propodeum distinct and strong......................................................................................................................................................................... C. (M.) chinensis (Zhang, 1984)

- Apical margin of clypeus truncate; length of 3 rd antennomere about 5.3 × its width; lateral teeth of propodeum small and weak.................................................................. C. (M.) gladiclypis (Ji & Chen, 2003)

80 Apical margin of clypeus sinuous, shallowly excised medially; penultimate antennomere 3.5 ×its width.................................................................................. C. (M.) circulariforameni (Chen & Ji, 2003)

- Apical margin of clypeus truncate or convex; penultimate antennomere <2.0 × its width............................ 81

81 Length of 3 rd antennomere longer than 4.5 × its width........................................................ 82

- Length of 3 rd antennomere shorter than 4.0 × its width....................................................... 83

82 Temple strongly narrowed behind eyes; lateral teeth of propodeum small and weak...... C. (M.) elegantulus (Tobias, 1986)

- Temple parallel-sided behind eyes; lateral teeth of propodeum distinct and strong...... C. (M.) elongates (Ji & Chen, 2003)

83 Hind femur densely and long setose; apical aperture in posterior view reddish brown.... C. (M.) longihair (Chen & Ji, 2003)

- Hind femur rather smooth; apical aperture in posterior view black.............................................. 84

84 Apical margin of clypeus convex........................................................................ 85

- Apical margin of clypeus truncate....................................................................... 86

85 Lateral teeth of propodeum distinct and strong; vein SR1 of fore wing curved........ C. (M.) hubeiensis (Ji & Chen, 2003)

- Lateral teeth of propodeum small and weak; vein SR1 of fore wing straight............ C. (M.) sculptur (Chen &Ji, 2003)

86 Lateral teeth of propodeum small and weak; length of 3 rd and penultimate antennomeres 4.0 × and 2.0 × their width, respectively................................................................. C. (M.) holisi (Chen & Ji, 2003)

- Lateral teeth of propodeum distinct and strong; length of 3 rd and penultimate antennomeres shorter than 3.5 × and 1.8 × their width, respectively................................................................................... 87

87 Vein SR1 of fore wing curved.......................................................................... 88

- Vein SR1 of fore wing straight.......................................................................... 89

88 Temple strongly narrowed behind eyes; hind femur about 4.5 × longer than wide.......... C. (M.) volgensis (Tobias, 1986)

- Temple parallel-sided behind eyes; hind femur shorter than 4.0 × longer than wide... C. (M.) tianchiensis (Ji & Chen, 2003)

89 Carapace with a large yellow medial spot; middle part of scutellum smooth........ C. (M.) guadunensis (Ji & Chen, 2003)

- Carapace entirely black; middle part of scutellum densely punctate-rugose....................................... 90

90 Antennomeres of male 18; palpi yellowish; body length 2.5 mm ............................ C. (M.) jungi (Chu, 1936)

- Antennomeres of male 26; palpi black; body length 3.0 mm.......................... C. (M.) mushanus (Sonan, 1932)