Dolichogenidea pentgona Liu & Chen, sp. nov.

(Figs 51, 69)

Description. Holotype. Female. Body length 1.8 mm, fore wing length 2.3 mm.

Head. Weakly transverse in dorsal view, 1.6× as wide as long, nearly as wide as mesoscutum (Fig. 51g). Temple a little shiny with shallow punctuation, not constricted behind eyes from dorsal view. Face (Fig. 51f) transverse, 0.8× as high as wide, shiny with small punctures, inner margins of eyes indistinctly converged posteriorly. Posterior tangent to anterior ocellus virtually touching posterior pair of ocelli, distance between fore and a hind ocellus as long as diameter of an hind ocellus, POL:OD:OOL = 3.5:1.5:3.0. Antenna as long as body, penultimate antennomere 1.5× longer than wide.

Mesosoma. Length:width:height = 32.0:22.0:21.5. Disc of mesonotum (Fig. 51e) shiny, deeply punctate, punctures sparse and unevenly distributed on lateral-posterior sides, slightly rugulose between punctures on medio-posterior part. Scutellar sulcus nearly straight, broad with carinae inbetween. Scutellum highly shiny and polished with some shallow punctures. Propodeum shiny, with well-defined pentagonal areolation which closed at anterior end, costulae well-defined, three posterior fields polished and smooth, shiny and anterio-lateral parts slightly uneven with indistinct punctures. Mesopleuron highly polished and with shallow punctures anteriorly.

Legs. Hind femur slightly stout (3.0× as long as wide). Hind tibia and tarsus missing.

Wings. Pterostigma small, 3.2× as long as its widest part (Fig. 51b). Vein 1-R1 1.3× longer than pterostigma, 6.0× as long as its distance from apex of marginal cell. Vein r arising from middle of pterostigma, perpendicular to pterostigma, nearly as long as width of pterostigma, r weakly longer than 2-SR, distinctly angled at meeting, 2-M 4/5 of 2-SR and a little longer than 1-SR and as long as 2-SR+M, m-cu as long as r. First discal cell of fore wing 1.2× as wide as high. Second discal cell of hind wing indistinct, 2.0× wider than high. Vein cu-a strongly incurved (Fig. 51d).

Metasoma. 0.9× longer than mesosoma. T1 (Fig. 51h) parallel-sided, but slightly constricted posteriorly, 1.7× longer than hind width, basal 1/3 concave and nearly polished, turned-over part 1.1× longer than wide, strongly rugose, shiny and polished at medio-apically. T2 highly shiny, polished with weak transversal striae at apex, 3.2× wider than long in middle, nearly straight apically. T3 1.5× longer than T2. Tergites posterior to T2 highly polished, shiny, and sparsely pubescent. Hypopygium not longer than apex of metasoma. Ovipositor sheath (Fig. 51i) 0.6 length of hind femur, very thin and parallel-sided, ovipositor weakly curved and with a weakly differentiated apical attenuation which nearly equal to basal part.

Colour. Black, T2–T3 yellowish brown (Fig. 51a, h). Tegula black. Palpi whitish. Antenna and ovipositor sheath brown. Labrum dark reddish brown and mandible yellowish brown. Legs yellow, coxae dark. Wing membrane hyaline, vein 1-R1, C+SC+R, upper border of pterostigma dark brown, pterostigma, r, 2-SR and 2-M light brown and other alar veins more or less whitish yellow, pterostigma without basal spot.

Male. Unknown.

Host. Unknown.

Material examined ( ZJUH). Holotype: ♀, Tianchi, Jianfengling, Hainan, 2008.XI.25, Wang Manman, No. 200806127.

Distribution. Oriental [China: Hainan].

Etymology. The specific name “ pentgona ” derived from the Latin, referring to the areolation on propodeum is pentagonal.

Remarks. This species is closely similar to D. clausa Liu & Chen, sp. nov. but differs in the following: pterostigma without basal spot (the latter with); head less transverse in dorsal view, 1.6× as wide as long (the latter more transverse, 2.0×); temple not constricted behind eyes from dorsal view (the latter strongly constricted).