Holotype: female [on slide, NEFU], CHINA, Heilongjiang Province, Shangzhi City, Laoyeling (45°24.71'N, 127°40.41'E), 8–18.VII.2013, Cheng-de Li, Ye Chen, Chao Zhang, MT. Paratypes: 1 male [on slide, NEFU], same data as holotype. 1 male [on slide, NEFU], CHINA, Heilongjiang Province, Shangzhi City, Laoyeling, 7–16.VIII.2013, Cheng-de Li, MT.

Centrodora crassiscapa sp. n. is easily distinguished by following combination of characters: enormously thick scape, largely dark brown mesosoma, completely dark brown metasoma, long and strongly exserted ovipositor.

Female. Holotype. Length about 1.2 mm. Head dark brown. Eyes and ocelli dark brown. Antenna mostly brown, except pedicel and F1 paler. Mandible dark brown. Mesosoma largely dark brown, except metanotum and propodeum yellow. Median area of the mesoscutum and mesoscutellum with a distinctly pale mid-longitudinal groove. Fore wing with basal one fourth hyaline, area posterior to marginal vein brown, remaining wing disc faintly infuscate; hind wing hyaline. Legs largely yellow, except fore leg with distal half of femur and tibia brownish-yellow; mesofemur and hind leg with coxa and femur brown. Metasoma dark brown to black.

Head (Fig. 1), in frontal view, 0.95× as high as wide, and finely reticulate, with the sculpture on malar space lineolate reticulated. Frontovertex 0.43× head width and with numerous brown setae. Ocellar triangle with apical angle obtuse. Mandible with two acute teeth and a blunt dorsal tooth. Antennae (Fig. 2) with scape 3.26× as long as wide, remarkably wider than any other antennal segments and slightly longer than clava; pedicel 2.14× as long as wide, and 0.83× as long as F3; F1 subtriangular, with ventral margin 1.40× as long as wide; F2 2.0× as long as wide; F3 with dorsal margin 3.21× as long as wide, and 0.6× as long as clava; clava 3.95× as long as wide, pointed and distinctly curved ventrally at apex. Measurements, length (width): scape, 163 (50); pedicel, 75 (35); F1, 28 (20); F2, 40 (20); F3, 90 (28); clava 150 (38).

Figures 1–8. 

Centrodora crassiscapa sp. n., holotype female: 1 head, frontal view 2 antenna 3 mesoscutum 4 mesoscutellum and metanotum 5 fore wing 6 hind wing 7 mesotibia and tarsus 8 metasoma.

Mesosoma. Pronotum imbricate, mesoscutum and mesoscutellum mainly polygonal reticulate. Mesoscutum with median area (Fig. 3) 0.83× as long as wide, 1.4× as long as mesoscutellum, and with 10 setae; each lateral area of the mesoscutum and axilla with 2 and 1 setae respectively; mesoscutellum (Fig. 4) 0.58× as long as wide, with 2 pairs of setae. Distance between anterior pair of scutellar setae 0.9× that between posterior pair. Placoid sensilla much closer to anterior pair of setae than to posterior pair. Fore wing 3.57× as long as wide, with marginal setae 0.08× wing width. Costal cell slightly longer than marginal vein, with 2 distal setae on dorsal surface; submarginal vein with 4 setae, marginal vein with 8 long setae along anterior margin, postmarginal vein short and about one third of length of stigmal vein; basal cell with 2 setae. Linea calva closed by a line of setae posteriorly. Hind wing (Fig. 6) 7.17× as long as wide, marginal setae about 0.53× as long as wing width. Mesotibial spur (Fig. 7) distinctly shorter than (0.64×) corresponding basitarsus, and about as long as the second tarsomere. Measurements, length (width): fore wing 1250 (350); costal cell, 270; marginal vein, 260; postmarginal vein, 13; stigmal vein, 39; marginal setae, 28; hind wing, 1075 (150); marginal setae, 80; mesotibia, 390, mesotibial spur, 90, mesobasitarsus, 140.

Metasoma (Fig. 8) about 1.75× as long as mesosoma. Ovipositor 3.25× as long as mesotibia and strongly exerted, with the exerted part 0.46× as long as ovipositor. Third valvula 4.18× as long as mesobasitarsus. Length measurements: ovipositor, 1268; third valvula, 585.

Male. Length 0.73–0.78 mm. Colour similar to the female, except median area of mesoscutum a little paler.

Head, in frontal view, 0.9× as high as wide and frontovertex about 0.4× head width. Scape (Fig. 9) flattened and expanded medially, 2.37× as long as wide; pedicel 1.64–1.70× as long as wide; F1 triangular, 1.20× as long as wide, F2 anelliform, F3 long, 2.69–2.85× as long as wide, and 0.71–0.77× as long as clava; clava 3.69–4.08× as long as wide, slightly longer than scape. Fore wing (Fig. 10) 3.04× as long as wide, marginal setae 0.17× wing width; hind wing 7.11–7.25× as long as wide, marginal setae 0.63× wing width. Genitalia (Fig. 11) 5.30× as long as wide, and about as long as mesotibia.

Figures 9–11. 

Centrodora crassiscapa sp. n., paratype male: 9 antenna 10 fore wing 11 genitalia.

The new species is close to C. amoena Förster 1878, with similar colour on the head and metasoma and strongly exserted ovipositor. However, it can be separated from the latter by the thickened scape of the female antennae (normal in C. amoena), completely dark brown mesoscutum (vs largely yellow), clava 3.95× as long as wide (vs 3.5×), male antenna with F3 2.69–2.85× as long as wide (vs about 4×, cf.Nikol’skaya and Yasnosh 1966, fig. 162).

Unknown.

Latin: crassus = thick, fat; and the specific name refers to the enormously thick scape of the female antennae.

China (Heilongjiang).

Holotype: female [on slide, NEFU], CHINA, Heilongjiang Province, Shangzhi City, laoyeling (45°24.71'N, 127°40.41'E), 8–18.VII.2013, Cheng-de Li, Ye Chen, Chao Zhang, MT. Paratype: 1 female [on slide, NEFU], CHINA, Shandong Province, Qingdao City, xiaozhu Mountain (35°58.38'N, 120°05.76'E), 18–20.V.2014, Xiang-xiang Jin, Guo-hao Zu, Si-zhu Liu, yellow pan trapping.

Centrodora pellucida sp. n. can be easily distinguished from other species in this genus by the following combination of characters: upper half of head yellowish-brown; gaster dark brown; fore wing mostly infuscate and paler distally, with a wide transparent cross band on the median area of disc as in Fig. 16; F2 subquadrate, and ovipositor strongly exserted.

Figures 12–19. 

Centrodora pellucida sp. n., holotype female: 12 head, frontal view 13 antenna 14 mesoscutum 15 mesoscutellum and metanotum 16 fore wing 17 hind wing 18 mesotibia and tarsus 19 metasoma.

Female. Holotype [The colour of body faded during slide mounting, and the following descriptions of colour is based on alcohol-preserved specimens]. Length 0.95 mm. Head with frontovertex, upper face, and occiput above foramen yellowish brown; remainder of head brown. Eyes and ocelli yellowish-brown. Antenna brown. Mandible yellowish-brown, with apex dark brown. Mesosoma largely yellowish-brown, but with mesopleuron brown and with a pale yellow mid-longitudinal groove on median area of mesoscutum, mesoscutellum, metanotum, and propodeum. Fore wing mostly infuscate and paler distally, with a wide transparent cross band on the median area of disc as in Fig. 16. Hind wing faintly infuscate. Leg mostly brownish; mesocoxa paler; meso- and metafemur, both basal one third of meso- and metatibia dark brown. Metasoma mostly dark brown, with petiole and third valvula yellowish.

Head (Fig. 12), in frontal view, 0.77× as high as wide; face and malar space finely reticulate. Frontovertex about 0.37× head width, with numerous coarse and brown setae. Ocellar triangle with apical angle about 90°. Mandible with two teeth and a truncation. Antennae (Fig. 13) with scape 4.13× as long as wide, about as long as clava; pedicel 2.0× as long as wide, about as long as F3; F1 triangular, 1.64× as long as wide, with ventral margin very slightly shorter than F2; F2 subquadrate, slightly shorter than half of F3; F3 2.12× as long as wide, 0.44× as long as clava; clava 4.0× as long as wide, pointed and distinctly curved ventrally at apex. Measurements, length (width): scape, 124 (30); pedicel, 50 (25); F1, 23 (14); F2, 25 (23); F3, 53 (25); clava, 120 (30).

Mesosoma with fine, elongate reticulations on median area of mesoscutum and mesoscutellum (Figs 14, 15). Median area of mesoscutum 0.93× as long as wide, 1.53× as long as mesoscutellum, and with 10 setae; each lateral area of the mesoscutum and axilla with 2 and 1 setae respectively; mesoscutellum 0.73× as long as wide, with 2 pairs of setae. Distance between anterior scutellar setae subequal to that between posterior pair. Placoid sensilla much closer to anterior pair of setae than to posterior pair. Fore wing (Fig. 16) 4.21× as long as wide, marginal setae 0.22× wing width. Costal cell slightly shorter than marginal vein, with 1 distal seta on dorsal surface; submarginal vein with 4 setae, marginal vein with 6 long setae along anterior margin, postmarginal vein 0.5× as long as stigmal vein; basal cell without seta. Linea calva closed by a line of setae posteriorly. Hind wing (Fig. 17) 6.86× as long as wide, marginal setae 0.67× wing width. Mesotibial spur 0.87× as long as corresponding basitarsus, and 0.83× as long as the second tarsomere. Measurements, length (width): fore wing, 738 (175); costal cell, 160; marginal vein, 170; postmarginal vein, 10; stigmal vein, 20; marginal setae, 38.5; hind wing, 600 (87.5); marginal setae, 59; mesotibia, 250; mesotibial spur, 65; mesobasitarsus, 75.

Metasoma (Fig. 19) about 1.4× as long as mesosoma. Ovipositor 2.45× as long as mesotibia and strongly exserted, with the exserted part 0.35× as long as ovipositor. Third valvula 3.07× as long as mid basitarsus. Length measurements: ovipositor, 613; third valvula, 230.

Male. Unknown.

The new species is very close to C. amoena Förster 1878 in having similar colour of the body and strongly exserted ovipositor. But it can be separated from the latter by F1 with ventral margin very slightly shorter than F2 (vs obviously shorter, cf.Nikol’skaya and Yasnosh 1966, fig. 150), F2 subquadrate (vs about 1.8× as long as wide), clava 4.0× as long as wide (vs 3.5×), fore wing mostly infuscate, with a transparent cross band on the median area of disc (vs mostly hyaline with the area beneath marginal vein and stigmal vein infuscate).

Unknown.

The specific name refers to the fore wing with a wide transparent cross band on the median area of disc.

China (Heilongjiang, Shandong).