Zaischnopsis candetibia Peng & Xiang & Liu 2018, sp. nov.

Zaischnopsis candetibia Peng, sp. nov.

(Figs 1–11, 40, 44)

Type material. Holotype ♀ (BMNH): Tien Fong Mts, Hainan Prov., 17.V.1983, Bouček (NHMUK010353630). Paratype: Danxian, Hainan Prov., 11.V.1983, Bouček (NHMUK010353624) (1♀ BMNH).

Description of holotype. FEMALE. Length excluding ovipositor sheath 5.0 mm. Head with greenish-blue metallic luster, upper face more bluish purple (Fig. 5), vertex dark purple (Fig. 6); setae of face, gena and occiput white, parascrobal region with one row of white setae (Fig. 5), setae of vertex black (Fig. 6). Maxillary and labial palpi dark brown (Figs 4, 5). Antennal scape with dark green metallic luster, pedicel and flagellum dark brown (Fig. 3). Pronotum with coppery, purple and green metallic luster, setae dark brown (Fig. 7); mesoscutum with bluish-green metallic luster, and with white hair-like setae (Fig.7); prepectus and tegula dark brown, tegula with brown setae (Fig. 7); mesopectus with dark blue metallic luster, with long white setae along acropleural sulcus, extending to level of about middle of tegula; acropleuron black with dark blue and purple metallic luster; scutellaraxillar complex black with dark green metallic luster, setae dark brown to black. Fore wing (Fig. 1) infuscate beyond level of parastigma and gradually lightened distally, but with one hyaline cross-band behind apex of marginal vein with white setae (Fig. 10). Legs with femora and tibiae dark brown, except basal half of dorsal margin of metatibia white (Fig. 8), metatibia with white hair-like setae; protarsus brown, mesotarsus pale yellowish brown except row of pegs and spur black, metatarsus pale yellowish brown (Figs 1, 8, 9). Metanotum and propodeum black with bluish-green metallic luster; propodeum with a patch of white hair-like setae mesad to spiracle and callar region setose lateral to spiracle (Fig. 2). Gaster elongate-lanceolate (Fig. 40), dark brown or dark purple with metallic luster (Figs 1, 11); apex of syntergum and ovipositor sheath pale yellowish brown (Fig. 11).

Head in frontal view (Fig. 5) 1.23× wider than high; in dorsal view (Fig. 6) width 1.43× length, with interocular distance 0.19× head width and less than width of eye; in lateral view (Fig. 4) 1.45× higher than long. Eye height 1.03× eye width in lateral view (Fig. 4); distance between eyes below 3.95× distance between eyes above (Fig. 5); malar space 0.42× eye height (Fig. 4); distance between toruli greater than distance between torulus and clypeal margin, and greater than distance between torulus and orbit. OOL: POL: LOL: MPOD = 1: 6: 10: 8. Vertex coriaceous around ocelli and transversely imbricate posteriorly (Fig. 6); lower face reticulate rugose (Fig. 5); gena longitudinally reticulate (Fig. 4); parascrobal region very narrow; scrobal depression transversely imbricate; interantennal region transversely reticulate (Fig. 5). Scrobal depression deep (Fig. 5), separated from anterior ocellus by distance equal to 1.1× diameter of anterior ocellus. Lower orbit above level of ventral margin of torulus. Antenna with scape foliaceously dilated (Figs 3, 5); relative length (width) of scape 40(13); pedicel 13(7); 1 st to 8 th funiculars: 5(5), 18(5), 19(6), 25(8), 16(9), 13(10), 11(10), 9(11); clava 30(11).

Pronotum in dorsal view divided medially, pentagonal, transversely imbricate (Fig. 7). Mesoscutum almost flat but slightly convex anteriorly, lateral lobe carinate posteriorly (Fig. 7). Scutellar-axillar complex flat, coarsely longitudinally reticulate; scutellum 1.40× longer than broad (Fig. 7). Mesopectus meshlike reticulate, acropleuron with very fine longitudinally aligned coriaceous sculpture. Fore wing extended near apex of gaster, with SMV: MV: PMV: STV = 25: 33: 17: 8. Middle leg with spur shorter than basitarsus (Fig. 9); mesotarsus with row of pegs on either side of basal four tarsomeres. Hind leg with basitarsus as long as following two tarsomeres combined (Fig. 8). Propodeum with anterior margin broadly V-shaped (Figs 2, 44, indicated by arrows); plical region comparatively broad, coarsely reticulate; callar region smooth and shiny (Figs 2, 44).

Gaster longer than mesosoma (Fig. 1), elongate-lanceolate (Fig. 11); Gt 1 –Gt 3 deeply V-like emarginate, Gt 4 and Gt 5 slightly emarginate, Gt 6 convex, syntergum tapered to sharp apex (Fig. 40); ovipositor sheath exserted for short distance, as long as 4/5 of basal metatarsomere.

Variation. The female paratype is 4.7 mm in length; scrobal depression separated from anterior ocellus by distance about 0.9× diameter of anterior ocellus.

Distribution. CHINA: Hainan.

Remarks. Females of this new species have a similar fore wing colour pattern (Fig. 10) as those of Z. tubatius (Fig. 34), Z. keralensis (Fig. 48) and Z. mampadicus (Fig. 52), but differ by the dorsal margin of the metatibia being white basally (Fig. 8). Further, the tibial spur of Z. keralensis is yellow or pale yellow, Gt 3 is slightly emarginate and Gt 4 is evenly convex, whereas Z. candetibia has the mesotibial spur very dark brown to black, Gt 3 is deeply emarginate, and Gt 4 is slightly emarginate; the middle of the propodeum of Z. tubatius is very narrow (Figs 36, 47), whereas the middle of propodeum of Z. candetibia is broader (Figs 2, 44). The gaster of Z. mampadicus was described as about 1.8× longer than the mesosoma, whereas the gaster of Z. candetibia is only about 1.4× longer than the mesosoma.

Etymology. The species name is a combination of the Latin words “ candeo ” which means shining white, and “ tibia ”, in reference to the metatibia having a white margin basally.