Monilobracon longitudinalis, Li & Achterberg & Chen, 2020

Li, Yang, Achterberg, Cornelis van & Chen, Xue-xin, 2020, A new genus and eight newly recorded genera of Braconinae Nees (Hymenoptera, Braconidae) from China, with descriptions of fourteen new species, ZooKeys 1038, pp. 105-178 : 105

Monilobracon longitudinalis sp. nov. Figures 23 , 24

Material examined.

Holotype: ♀, China, Yunnan Prov., Xishuangbanna, Xiaomengyang , 850 m, 20.X.1958, Pu Fuji, No. IOZ(E)1964555 (IZCAS) . Paratypes. 2♀, same data as holotype, but No. IOZ(E)1964575 and IOZ(E)1964576 (IZCAS) . 1♀, id., but 19.VIII.1958, Zhang Yiran, No. IOZ(E)1964557 (IZCAS).

Diagnosis.

This new species is very similar to Monilobracon quadriceps (Smith, 1858) [Malaysia], but can be separated from the latter by the following characters: hind coxae blackish brown (reddish brown in M. quadriceps ); wing membrane yellow, greyish brown apically, without subhyaline spot (with few subhyaline spots); T I blackish brown laterally (lateral areas yellow); fore wing vein 1-SR+M more or less straight (weakly curved).

Description.

Holotype, ♀, length of body 15.2 mm, of fore wing 14.8 mm, of ovipositor sheath 16.6 mm.

Head. Antenna with 64 antennomeres; apical antennomere pointed and slightly acute, 2.1 × longer than its maximum width (Fig. 24l ); penultimate antennomere 1.2 × longer than its maximum width, and 0.6 × as long as apical antennomere; median antennomeres 0.9 × longer than wide; third antennomere 1.3 and 1.4 × longer than fourth and fifth, respectively, the latter 1.2 × longer than wide; length of maxillary palp 0.8 × height of head; malar suture with sparse short setae, and with fine punctures (Fig. 24i ); clypeus height: inter-tentorial distance: tentorio-ocular distance = 7: 10: 8; clypeus with sparse long setae; eye weakly emarginated (Fig. 24g ); face largely glabrous except for a few short setae, and with some sparse punctures (Fig. 24g ); eye height: shortest distance between eyes: head width = 4: 5: 10; frons largely smooth, strongly concave behind antennal sockets, with a developed median groove (Fig. 24h ); vertex largely smooth except for a few weak punctures, with some sparse short setae; minimum distance between posterior ocelli: minimum diameter of elliptical posterior ocellus: minimum distance between posterior ocellus and eye = 5: 6: 18; length of malar space 1.0 × basal width of mandible; temples largely glabrous except for a few short setae, and subparallel behind eyes (Fig. 24h ); in dorsal view length of eye 1.4 × temple.

Mesosoma. Length of mesosoma 1.9 × its height (Fig. 24c ); notauli impressed anterior half, shallow posteriorly (Fig. 24d ); mesoscutum smooth, with sparse short setae (Fig. 24d ); scutellar sulcus wide, moderately deep, and with crenulae (Fig. 24d ); scutellum with dense short setae posteriorly; metanotum strongly convex medially (Fig. 24d ); propodeum smooth, without medio-longitudinal groove anteriorly, with a few short crenulae posteriorly, with sparse setae medially, and with dense long setae laterally (Fig. 24d ).

Wings. Fore wing (Fig. 24a ): SR1: 3-SR: r = 38: 35: 7; 1-SR+M more or less straight, and 1.1 × longer than 1-M; 2-SR: 3-SR: r-m = 16: 35: 15; m-cu straight, and 4.0 × longer than 2-SR+M; cu-a slightly postfurcal. Hind wing (Fig. 24b ): 1r-m transverse; SC+R1: 2-SC+R: 1r-m = 28: 4: 19.

Legs. Length of fore femur: tibia: tarsus = 5: 6: 9; length of hind femur: tibia: basitarsus = 38: 69: 21; length of femur, tibia, and basitarsus of hind leg 3.8, 9.9, and 5.3 × their maximum widths, respectively (Fig. 24f ).

Metasoma. Length of T I 1.3 × its apical width, median area convex and with a medio-longitudinal carina, smooth anteriorly, and longitudinally rugose posteriorly (Fig. 24j ); lateral grooves of T I sparsely crenulate (Fig. 24j ); T II longitudinally rugose including medio-basal area, but antero-lateral areas smooth posteriorly (Fig. 24e ); triangular medio-basal area of T II moderately large, attached to medio-longitudinal carina apically but absent near posterior margin of T II; antero-lateral areas of T II developed, longitudinally rugose anteriorly and smooth posteriorly, anterior grooves weakly and sparsely crenulate (Fig. 24e ); second suture deep and crenulate, wide and curved medially, narrow laterally (Fig. 24e ); T III largely longitudinally rugose but smooth posteriorly, antero-lateral areas weakly rugose; T III-V with antero-lateral areas, and crenulate transverse subposterior groove (Fig. 24e ); T IV-VII smooth, and with dense long setae posteriorly; hypopygium acute apically, reaching level of apex of metasoma; ovipositor sheath 1.1 × as long as fore wing.

Colour. Head and mesosoma largely yellow (Fig. 23 ); antenna, eye, and mandible apically black (Fig. 24g ); fore and middle legs (except for tarsus apically and claws black) yellow, hind leg black (Fig. 24f ); metasoma (except T I and T II dark brown) and ovipositor sheath black (Figs 23 , 24e ); wing membrane yellow, but black brown apically (hind wing including posterior margin medially), stigmal spot black brown, first subdiscal cell of fore wing with a blackish brown spot medio-posteriorly, pterostigma yellow but apically blackish brown, basal veins yellow and apical veins dark brown (Fig. 24a, b ).

Variation. Length of body of female 14.9-15.9 mm, of fore wing of female 14.6-15.6 mm, and of ovipositor sheath 16.6-21.0 mm; antenna of female with 64-66 antennomeres; median antennomeres 0.9-1.2 × longer than wide; face sometimes with dense short setae; length of mesosoma 1.7-1.9 × its height; fore wing vein SR1 0.9-1.1 × longer than vein 3-SR; ovipositor sheath 1.1-1.3 × as long as fore wing; second-ninth antennomeres sometimes infuscate.

Biology.

Unknown.

Distribution.

China (Yunnan).

Etymology.

Named after the largely longitudinally rugose T I-III: longitudinalis is Latin for longitudinal.

Figures

Figure 23. Monilobracon longitudinalis sp. nov., ♀, holotype, habitus, lateral view.

Figure 24. Monilobracon longitudinalis 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, anterior 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.