Bracon (Bracon) terebralis Tobias, 2000

Samartsev, Konstantin & Ku, Deok-Seo, 2021, New records of Braconinae (Hymenoptera, Braconidae) from South Korea, Journal of Hymenoptera Research 83, pp. 21-72 : 21

Bracon (Bracon) terebralis Tobias, 2000

Figs 59-67 , A5

Bracon terebralis Tobias, 2000 in Belokobylskij and Tobias 2000: 138.

Bracon megaventris Li, He & Chen, 2020b: 227; syn. nov.

Material.

South Korea (13 females, 1 male). - Gangwon-do • 1 female; Sokcho-si, [7] Seorak-dong ; 11 Jun. 1992; D.-S. Ku leg.; SMNE 961. - Gyeonggi-do • 4 females; Gapyeong-gun, [31] Cheongpyeong-myeon, Cheongpyeong-ri, Cheongpyeong Amusement Park; 14 Jun. 1992; D.-S. Ku leg.; SMNE 193, 423-425 • 1 male; same data as for preceding; SMNE 426 • 1 female; Suwon-si, [37] Gwonseon-gu, Seodun-dong, Yeogisan Mountain ; 11 May 1994; D.-S. Ku leg.; SMNE 427 • 1 female; same data as for preceding; 26 May 1994; SMNE 428 • 2 females; same data as for preceding; 8 Jun. 1994; ZISP 430, 431 • 1 female; same data as for preceding; NIBR 432 • 2 females; same data as for preceding; SMNE 865, 913. - Gyeongsangbuk-do • 1 female; Bonghwa-gun, [41] Mulya-myeon, Ojeon-ri, Seondalsan Mountain ; 28 May 1998; Jeong-Gyu Kim leg.; SMNE 429 .

Additional material.

Russia - Primorskiy Territory • 1 female (holotype); Partizansky District, 10 km SE of Partizansk, Novitskoe ; 20 Jul. 1984; S.A. Belokobylskij leg.; oak forest; ZISP .

Distribution.

Russia: Far East: Primorskiy Territory. South Korea (new record).

Description.

Female. Fore wing length 2.7-2.9 mm ( Li et al. 2020b: 3.6 mm). Width of head (dorsal view) 1.7-1.8 × its median length. Transverse diameter of eye (dorsal view) 1.8-2.1 × longer than temple. OOL 2.2-2.8 × Od; POL 1.3-1.6 × Od; OOL 1.6-1.8 × POL. Longitudinal diameter of eye (lateral view) 1.4-1.5 × its transverse diameter; hind margins of eye and temple parallel to broadened downwards. Face width 1.5-1.6 × combined height of face and clypeus. Longitudinal diameter of eye 2.4-3.2 × longer than malar space (anterior view). Malar suture absent. Width of hypoclypeal depression 1.2-1.5 × distance from depression to eye. Antenna 1.1-1.2 × longer than fore wing, with 29-32 ( Li et al. 2020b: 35) antennomeres. First, middle and penultimate flagellomeres 2.1-2.3 ×, 1.8-2.3 × and 2.1-2.4 × longer than wide, respectively. Mesosoma 1.8-2.0 × longer than its maximum height. Mesoscutum setose on notaulic area and medioposteriorly. Notauli deep anteriorly, shallow and not united posteriorly. Mesepimeral and metapleural sulci smooth. Propodeum with short medio-longitudinal keel apically, branching. Fore wing vein r arising from basal 0.45-0.50 of pterostigma; vein 1-R1 1.4 × longer than pterostigma; marginal cell 11-16 × distance from its apex to apex of wing; vein 3-SR 2.7-3.5 × vein r, 0.5-0.6 × vein SR1, 1.2-1.5 × vein 2-SR. Hind femur 2.7-3.1 × longer than wide. Hind tibia without subapical row of thick setae. Fifth segment of hind tarsus 0.6-0.7 × as long as hind basitarsus, 1.0-1.3 × longer than second segment. Claws with large, more or less angularly protruding basal lobe. First metasomal tergite with incomplete dorsal carinae more or less strongly curved towards apex of tergite and with weakly separated dorsolateral carinae, its median length 0.95-1.10 × as large as its apical width. Second tergite with very short triangle weakly elevated median area and without dorsolateral impressions; medially 0.86-0.97 × as long as third tergite; its basal width 1.4-1.6 × its median length. Apical margins of third-sixth tergites thin. Ovipositor sheath 0.75-0.90 × as long as hind tibia, 0.20-0.25 × as long as fore wing. Apex of ovipositor with weak nodus and weak ventral serration. Body mostly smooth; face and frons smooth; malar space granulate; propodeum rugulose near its posterior margin; first metasomal tergite laterally weakly rugulose, its median area obliquely rugulose posteriorly; second tergite rugulose to almost smooth; third tergite weakly granulate to smooth; posterior tergites smooth. Body mostly brownish black; legs and desclerotised parts of metasomal sterna yellow; maxillary palps pale yellow; tegulae yellow or brownish yellow; wing membrane weakly brownish darkened, pterostigma brown and wing veins brown.

Diagnosis.

Bracon terebralis differs from other species of the section Bracon terebralis Orthobracon Fahringer sec. Tobias (1986) by a combination of the short ovipositor, strongly smoothed sculpture on head (Fig. 60 ), propodeum, and metasoma (Fig. 63 ), and by the long antenna with ca. 30-35 segments (Fig. 59 ).

Figures

Figures 55 - 67. Bracon (Bracon) subcylindricus Wesmael, 1838 (55 - 57 female, NIBR 58 female, ZISP) and B. (B.) terebralis Tobias, 2000 (59 - 63 holotype, female, ZISP) 55, 59 habitus, lateral view 56, 67 head, lateral view 57, 60 head, anterior view 58, 63 metasoma and propodeum, dorsal view 61 first metasomal tergite, dorsolateral view 62 head, dorsal view 64 hind tarsus 65 apex of ovipositor 66 apex of fore wing. Scale bars: 0.25 mm (60, 61, 65); 0.5 mm (56, 57, 62 - 64, 67); 1 mm (55, 59, 66).

Figures A 5 - A 8. Collecting localities of the material on the species new to South Korea. Point numbers correspond with numbers in brackets in text.