Ischnobracon guttatus sp. nov. Figures 17, 18

Material examined.

Holotype: ♀, China, Hainan Prov., Jianfengling, 29.IV.1983, Gu Maobin, No. IOZ(E)1964612 (IZCAS).

Diagnosis.

This new species is very similar to I. baltazarae Quicke & Butcher, 2010 [Philippines], but can be separated from the latter by the following characters: scape blackish brown with a reversed U-shaped yellow spot dorsally (yellow with black lateral streak in I. baltazarae); second submarginal cell of fore wing relatively short, vein 2-M 2.8 × as long as vein 2-SR (3.45 × vein 2-SR); fore wing vein cu-a distinctly curved and postfurcal (straight and interstitial); base of hind wing with rather narrow glabrous areas on either side of vein cu-a (hind wing subbasal cell glabrous on posterior half and with large glabrous area distal to vein cu-a); hind femur yellow, without black mark (hind femur black ventro-distally).

Description.

Holotype, ♀, length of body 14.8 mm, of fore wing 12.0 mm, of ovipositor sheath 9.0 mm.

Head. Antenna incomplete, with 88 antennomeres remaining; median antennomeres 1.6 × wider than their length; third antennomere 1.1 and 1.2 × longer than fourth and fifth respectively, the latter being 1.4 × wider than its length; scapus 1.5 × longer than its apical width (Fig. 18j); tentorio-ocular distance: inter-tentorial distance: distance between clypeus and antennal sockets = 7: 9: 14; shortest distance between eyes: head width: eye height = 18: 35: 17; shortest distance between posterior ocelli: shortest distance between posterior ocellus and eye: width of head behind eyes (occiput) = 4: 9: 34; occiput with sparse setae medially, and with dense long setae laterally (Fig. 18h).

Mesosoma. Length of mesosoma twice its height (Fig. 18c); notauli only impressed on anterior third of mesoscutum (Fig. 18d).

Wings. Fore wing (Fig. 18a): r: SR1: 3-SR = 8: 17: 19; 1-SR+M more or less straight; 2-SR: 3-SR: r-m = 8: 17: 8; 2-M 2.8 × longer than 2-SR; cu-a strongly curved and postfurcal. Hind wing (Fig. 18b): base with a rather narrow glabrous area distal to cu-a; 2-SC+R distinctly transverse; 1r-m 1.9 × longer than SC+R1.

Legs. Length of fore femur: tibia: tarsus = 24: 27: 38; fore basitarsus 4.2 × longer than its maximum width; fore tarsus ventro-apically with rather dense and long setae; length of hind femur: tibia: basitarsus = 33: 48: 16; length of femur, tibia and basitarsus of hind leg 3.9, 8.0 and 4.0 × their maximum width, respectively (Fig. 18f).

Metasoma. Metasomal tergites smooth (Fig. 18e); length of T I 1.6 × its apical width, raised median area not depressed medially (Fig. 18e); median length of T II 1.1 × its apical width; antero-lateral areas of T III large, apical width of T III 1.2 × its median length (Fig. 18e); tergites with dense and long setae especially posteriorly except for the raised areas (Fig. 18e); ovipositor sheath 0.7 × as long as fore wing.

Colour. Largely yellow (Fig. 17); eye, mandible apically, metanotum and propodeum blackish brown (Fig. 18d, g); antenna blackish brown, becoming yellow towards apex (Fig. 17); scapus with a reverse yellow U-shaped spot dorsally (Fig. 18k); around stemmaticum with a drop-shaped black spot (Fig. 18h); ovipositor sheath black (Fig. 17); wing membrane largely yellow but smoky grey apically; stigmal spot brown; marginal cell with a small brown spot anteriorly; pterostigma yellow; veins largely yellow (Fig. 18a, b).

Biology.

Unknown.

Distribution.

China (Hainan).

Etymology.

Named after the surrounded area of stemmaticum with a drop-shaped black spot: guttatus is Latin for drop-shaped.