Iphiaulax longinervis, Li & Achterberg & Chen, 2020

Li, Yang, Achterberg, Cornelis Van & Chen, Xue-Xin, 2020, Two genera Campyloneurus Szépligeti and Iphiaulax Foerster in China, with the descriptions of fourteen new species (Hymenoptera, Braconidae, Braconinae), Zootaxa 4884 (1), pp. 1-67 : 53-55

Iphiaulax longinervis sp. nov.

Figs 37–38

Type material. Holotype. CHINA • ♀; Yunnan Province, Xishuangbanna Xiaomengyang ; 850m; 18 Aug.1957; Y. R. Zhang leg.; IZCAS IOZ (E)1964515 . Paratype. CHINA • 1♀; Yunnan Province, near Jingdong ; 1300m; 17 Mar. 1957; Bangfeiluofu leg.; IZCAS IOZ (E) 1964595.

Diagnosis. This new species is very similar to I. agraensis Cameron, 1897 , but can be separated from the latter by the following characters: head yellow with black dorsal marking not reaching eye orbits (reaching eye orbits in I. agraensis ); metasomal tergites uniformly black (uniformly yellow); hind leg mainly black (yellow); hind wing vein 1r-m 1.1–1.2 × as long as vein SC+R1 (0.9 ×).

Description. Holotype, ♀, length of body 15.8 mm, of fore wing 14.0 mm, of ovipositor sheath 2.0 mm.

Head. Antenna with 94 antennomeres; apical flagellomere acute, 2.8 × longer than its maximum width ( Fig. 38l ); first flagellomere 0.9 × longer than its maximum width, 1.2 and 1.3 × longer than second and third, respectively, the latter 0.8 × longer than its maximum width; malar suture developed and densely short setose ( Fig. 38i ); clypeus height: inter-tentorial distance: tentorio-ocular distance = 4: 9: 7; clypeus sparsely short setose; eye weakly emarginated ( Fig. 38g ); width of hypoclypeal depression twice its height; face 0.7 × longer than wide, largely smooth, with some punctures and long setae ( Fig. 38g ); eye height: shortest distance between eyes: head width = 17: 21: 40; frons smooth, weakly concave behind antennal sockets, with a strong median groove ( Fig. 38h ); vertex largely glabrous except for some sparse short setae; minimum distance between posterior ocelli: minimum diameter of elliptical posterior ocellus: minimum distance between posterior ocellus and eye = 4: 3: 10; in dorsal view length of eye 1.9 × temple ( Fig. 38h ).

Mesosoma. Length of mesosoma 2.1 × its height ( Fig. 38c ); notauli only impressed anteriorly ( Fig. 38d ); middle lobe of mesoscutum weakly convex; mesoscutum largely glabrous, but with some short setae along notauli ( Fig. 38d ); scutellar sulcus narrow, with a few rather weak crenulae ( Fig. 38d ); scutellum with dense short setae posteriorly; metanotum strongly convex medially ( Fig. 38d ); propodeum glabrous medially, without medio-longitudinal carina or groove, sparsely punctate and densely long setose laterally ( Fig. 38d ).

Wings. Fore wing ( Fig. 38a ): pterostigma 3.9 × longer than wide; SR1: 3-SR: r = 5: 4: 1; 1-SR+M more or less straight; 2-SR: 3-SR: r-m = 7: 20: 9; angle between 1-SR and C+SC+R about 80°; cu-a postfurcal, nearly not oblique anteriorly. Hind wing ( Fig. 38b ): SC+R1: 2-SC+R: 1r-m = 17: 4: 21.

Legs. Length of fore femur: tibia: tarsus = 20: 24: 29; length of hind femur: tibia: basitarsus = 32: 55: 14; length of femur, tibia and basitarsus of hind leg 2.3, 6.9 and 3.5 × their maximum width, respectively; hind tibial spurs 0.3 and 0.5 × as long as hind basitarsus.

Metasoma. Length of first metasomal tergite 1.3 × its apical width, median area convex and with longitudinal striae, medio-longitudinal carina present, but not reaching posterior margin of first tergite, lateral grooves sparsely crenulate ( Fig. 38j ); second tergite largely longitudinally striate, but antero-lateral and posterior areas smooth ( Fig. 38e ); apical width of second tergite 1.1 × its median length, anterior grooves crenulate ( Fig. 38e ); second suture wide and deep, crenulate, nearly straight medially ( Fig. 38e ); third tergite with antero-lateral areas; third–fifth tergites without subposterior groove ( Fig. 38e ); third–seventh tergites smooth; fourth–seventh tergites densely setose laterally and posteriorly; ovipositor sheath 0.14 × as long as fore wing.

Colour. Head and mesosoma largely yellow ( Fig. 37 ); antenna, mandible apically, frons medially ( Fig. 38g ), area surrounding stemmaticum and temple posteriorly black ( Fig. 38h ); metapleuron ventrally ( Fig. 38c ), middle lobe and lateral lobes of mesoscutum with a black spot ( Fig. 38d ); propodeum brown( Fig. 38d ); fore and middle legs yellow, hind leg black ( Fig. 38f ); metasoma and ovipositor sheath black ( Figs 37 , 38e ); wing membrane yellow, but dark brown apically, fore wing with irregular dark brown stigmal spot up to vein CU1b, and a dark brown spot around posterior half of vein 2-1A, including dark brown veins 1-SR, 1-SR+M, m-cu and 3-CU1 and apically wings with wide dark brown area; pterostigma and remainder of veins yellow ( Figs 38a, 38b ).

Variation. Length of body of female 13.1–15.8 mm, of fore wing of female 12.4–14.0 mm, and of ovipositor sheath 2.0–4.0 mm; antenna of female with 90 antennomeres; length of mesosoma 2.0 × its height; fore wing vein 1r-m 1.1 × as long as vein SC+R1; ovipositor sheath 0.14–0.32 × as long as fore wing; propodeum black; hind tibia and tarsus infuscate.

Biology. Unknown.

Distribution. China (Yunnan).

Etymology. Named after the relatively long vein 1r-m of the fore wing: “longus” and “nervis” is Latin for “long” and “sinew, vein”, respectively.

Figures

FIGURE 37. Iphiaulax longinervis sp. nov., ♀, holotype, habitus lateral.

FIGURE 38. Iphiaulax longinervis 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.