Bracon (Bracon) imbricatellus 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) imbricatellus Tobias, 2000

Figs 22-28 , A1

Material.

South Korea (4 females). - Gyeonggi-do • 1 female; Suwon-si, [36] Jangan-gu, Pajang-dong , Gwanggyosan Mountain ; 22 Jul. 1998; D.-S. Ku leg.; light trap; SMNE 943 • 1 female; Suwon-si, [37] Gwonseon-gu, Seodun-dong , Yeogisan Mountain ; 31 Jul. 1995; June-Yeol Choi leg.; Malaise trap; SMNE 944 • 1 female; same data as for preceding; 14 Aug. 1995; ZISP 937 • 1 female; same data as for preceding; NIBR 938 .

Additional material.

Japan - Fukushima Prefecture • 1 female (holotype); Hinoemata; 16-18 Aug. 1999; S.A. Belokobylskij leg.; ZISP .

Distribution.

Japan: Honshu. South Korea (new record).

Description.

Female. Fore wing length 2.6-3.0 mm. Width of head (dorsal view) 1.7-1.8 × its median length. Transverse diameter of eye (dorsal view) 1.6-2.0 × longer than temple. OOL 2.0-2.8 × Od; POL 1.2-1.8 × Od; OOL 1.6-1.7 × POL. Longitudinal diameter of eye (lateral view) 1.3-1.6 × its transverse diameter; hind margins of eye and temple subparallel. Face width 1.4-1.5 × combined height of face and clypeus. Longitudinal diameter of eye 3.1-3.3 × longer than malar space (anterior view). Malar suture weak under eye, smoothed near mandible. Width of hypoclypeal depression 1.2-1.4 × distance from depression to eye. Antenna 0.90-0.95 × as long as fore wing, with 24-25 antennomeres. First, middle and penultimate flagellomeres 2.0-2.1 ×, 1.7-2.0, and 1.8-2.2 × longer than wide, respectively. Mesosoma 1.7-1.8 × longer than its maximum height. Mesoscutum evenly, but sparsely setose. Notauli deep anteriorly, shallow and not united posteriorly. Mesepimeral and metapleural sulci smooth. Medio-longitudinal keel developed in apical third of propodeum, branching. Fore wing vein r arising from basal 0.40-0.45 of pterostigma; vein 1-R1 1.5-1.7 × longer than pterostigma; marginal cell 12-16 × longer than distance from its apex to apex of wing; vein 3-SR 2.0-2.5 × vein r, 0.55-0.65 × vein SR1, 1.3-1.4 × vein 2-SR. Hind femur 3.0-3.4 × longer than wide. Hind tibia without subapical row of thick setae. Fifth segment of hind tarsus 0.50-0.55 × and 0.95-1.00 × as long as hind basitarsus and second segment, respectively. Claws with acute angularly protruding basal lobe. First metasomal tergite with incomplete dorsal carina and developed dorsolateral carinae, its median length 0.70-0.85 × its apical width. Second tergite with weak, narrow, longitudinal median area, weak anterolateral areas with smooth sculpture, and with deep s-shaped crenulate dorsolateral impressions bordered by long carinae; medially 1.1-1.5 × longer than third tergite; its basal width 1.3-1.8 × its median length. Second metasomal suture deep, curved and crenulate. Apical margins of third-sixth tergites thick, with weakly foveate transverse subapical grooves. Ovipositor sheath 0.85-1.00 × as long as hind tibia and 0.23-0.25 × as long as fore wing. Apex of ovipositor with weak nodus and ventral serration. Body mainly smooth; face medially and malar space granulate, face laterally and frons weakly granulate; propodeum posteriorly hardly coriaceous, with tree-like rugosity medially in posterior half; first metasomal tergite smooth to weakly foveate; second tergite areolate-rugose to foveate; third-sixth tergites smoothed foveate, or metasoma entirely areolate-rugose to foveate-rugose. Head and mesosoma mostly reddish brown with yellowish brown pattern, legs and lateral and ventral parts of metasoma reddish yellow; antenna basally reddish yellow, flagellum darkening apically; maxillary palps yellow; tegulae brownish yellow; propodeum and most of metasoma dorsally dark brown; wing membrane weakly darkened, pterostigma and veins brown.

Remarks.

Relationships of the species are given below, in the diagnosis of B. virgatus Marshall.

Figures

Figures 22 - 36. Bracon (Bracon) imbricatellus Tobias, 2000 (22 - 28 holotype, female, ZISP) and B. (B.) longigenis Tobias, 1957 (29, 31, 32, 35, 36 holotype 30, 34 paratype, female, ZISP) 22 habitus, dorsal view 23, 34 head, anterior view 24, 29 head, lateral view 25, 35 first metasomal tergite, dorsal view 26 metasoma, dorsolateral view 27, 33 head (and mesoscutum), dorsal view 28 metasoma, dorsal view 30 head, ventrolateral view 31 habitus, lateral view 32 apex of ovipositor 36 metasoma and hind tarsus, dorsal view. Scale bars: 0.25 mm (32); 0.5 mm (23 - 30, 34 - 36); 1 mm (31).

Figures A 1 - A 4. Collecting localities of the material on the species new to South Korea. Point numbers correspond with numbers in brackets in text.