Indabracon discolor, Li & Tang & Chen, 2020

Li, Yang, Tang, Pu & Chen, Xue-xin, 2020, The genus Indabracon van Achterberg (Hymenoptera, Braconidae, Braconinae) in China, with description of four new species, Journal of Hymenoptera Research 76, pp. 39-56 : 39

Indabracon discolor sp. nov.

Figs 3 , 4

Type material.

Holotype. ♀, China, Yunnan Prov., Xishuangbanna Meng’a, 1050-1080m, 20.VIII.1958, Pu Fuji, No. IOZ(E)1964571 (IZCAS). Paratypes: 1♀, same label data, but Wang Shuyong, No. IOZ(E)1964563 (IZCAS).

Diagnosis.

This new species is very similar to I. albogilvus sp. nov., but can be separated from the latter by the following characters: head largely reddish brown, but face reddish yellow (largely yellow in I. albogilvus ); mesoscutum reddish brown (yellow, but lobes with black spot in I. albogilvus ); hind wing vein 2-SC+R longer than vein 1r-m (shorter than vein 1r-m in I. albogilvus ); in dorsal view length of eye 3.0 times temple and temples strongly narrowed behind eyes (length of eye 2.6 times temple and temples gradually narrowed behind eyes in I. albogilvus ).

Description.

Holotype, ♀, length of body 9.7 mm, of fore wing 9.1 mm, of ovipositor sheath 5.6 mm.

Head. Antenna with 56 segments; apical antennal segment strongly acute, 1.8 times longer than its maximum width (Fig. 4l ); third segment 1.2 and 1.3 times longer than fourth and fifth, respectively, the latter as long as wide; length of maxillary palp 0.8 times height of head; malar suture rather weak, punctate and with short setae (Fig. 4i ); clypeus height: inter-tentorial distance: tentorio-ocular distance = 3: 14: 7; clypeus with dense, long setae; eye hardly emarginated (Fig. 4g ); face coarsely rugose, with some striae and long setae laterally (Fig. 4g ); eye height: shortest distance between eyes: head width = 22: 18: 39; frons largely smooth except for a few weak punctures, with some sparse short setae and a strong median groove (Fig. 4h ); vertex largely smooth except for a few weak punctures, and with some sparse short setae; POL: OD: OOL = 3: 4: 6; length of malar space 1.3 times basal width of mandible; length of eye 3.0 times temple in dorsal view; temples largely glabrous except for a few long setae, and directly narrowed behind eyes (Fig. 4h ).

Mesosoma. Length of mesosoma 1.7 times its height (Fig. 4c ); notauli impressed anteriorly half (Fig. 4d ); mesoscutum smooth, with sparse long setae (Fig. 4d ); scutellar sulcus wide, deep, and with crenulae (Fig. 4d ); scutellum distinctly convex, moderately densely punctate, and with dense short setae posteriorly; metanotum strongly convex medially, and with a short median carina anteriorly (Fig. 4d ); propodeum largely smooth except for a few weak punctures and some crenulae medio-posteriorly, and with sparse setae medially, and dense, long setae laterally (Fig. 4d ).

Wings. Fore wing (Fig. 4a ): SR1: 3-SR: r = 29: 26: 4; 1-SR+M strongly angled after arising from 1-M, and 1.5 times longer than 1-M; 2-SR: 3-SR: r-m = 8: 26: 7; CU1b 0.5 times as long as 3-CU1; cu-a weakly postfurcal, and rather weakly bent basally towards base of wing. Hind wing (Fig. 4b ): 1r-m more or less straight; SC+R1: 2-SC+R: 1r-m = 23: 10: 7.

Legs. Length of fore femur: tibia: tarsus = 21: 25: 30; length of hind femur: tibia: basitarsus = 33: 50: 18; length of femur, tibia and basitarsus of hind leg 3.7, 8.3 and 6.0 times their maximum width, respectively.

Metasoma. Length of T1 1.1 times its apical width, median area convex and coarsely rugose, lateral areas largely smooth except for with a few striae anteriorly (Fig. 4j ); lateral grooves of T1 sparsely crenulate (Fig. 4j ); T2 largely coarsely sculptured, but medio-basal area smooth (Fig. 4e ); antero-lateral grooves of T2 strongly developed and crenulate (Fig. 4e ); second suture deep and crenulate, wide and straight medially, narrow laterally (Fig. 4e ); T3-4 with antero-lateral grooves, and latero-posterior corner medium-sized; T3-5 coarsely sculptured, and with crenulate transverse subposterior groove (Fig. 4e ); T6-7 largely weakly rugose, and with spare long setae posteriorly; hypopygium acute apically, not reaching level of apex of metasoma; ovipositor sheath 0.6 times as long as fore wing.

Colour. Largely black (Fig. 3 ); head and mesosoma largely reddish brown, but antenna, eyes, mandible apically and propodeum black, face reddish yellow (Fig. 4c, d, g ); fore femur and tibia somewhat infuscate; T1 whitish yellow (Fig. 4j ); wing membrane infuscate, pterostigma and veins dark brown (Fig. 4a, b ).

Variation. Length of body of female 7.3-9.7 mm, of fore wing of female 6.8-9.1 mm, and of ovipositor sheath 2.7-5.6 mm; ovipositor sheath 0.4-0.6 times as long as fore wing; fore femur and tibia sometimes reddish yellow ventrally.

Biology.

Unknown.

Distribution.

China (Yunnan).

Etymology.

Named after the T1 whitish yellow, while the remainder tergites black: " Indabracon discolor " is Latin for "not of the same color".

Figures

Figure 3. Indabracon discolor sp. nov., ♀, holotype, habitus lateral.

Figure 4. Indabracon discolor sp. nov., ♀, holotype a fore wing b hind wing c mesosoma, lateral view d mesosoma, dorsal view e metasoma, dorsal view f hind leg, lateral view g head, front view h head, dorsal view i head, lateral view j first metasomal tergite, dorsal view k scapus outer side, lateral view l apex of antenna m apex of ovipositor, lateral view.