Bracon (Bracon) longigenis Tobias, 1957

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) longigenis Tobias, 1957

Figs 29-36 , A3

Material.

South Korea (4 females). - Gyeongsangbuk-do • 1 female; Gyeongsan-si, [50] Yeongnam University ; 4 May 1988; D.-S. Ku leg.; SMNE 676 . - Chungcheongnam-do • 1 female ; Geumsan-gun, [53] Chubu-myeon, Seongdang-ri , Gaedeoksa Temple ; 22 May 1993; D.-S. Ku leg.; NIBR 673 • 1 female; same data as for preceding; SMNE 674 • 1 female; same data as for preceding; ZISP 675 .

Additional material.

Russia - Crimea Republic • female (holotype); Simferopol; 17 May 1927; V. and E. Kusnetzovs leg.; ZISP • 1 female (paratype); same data as for holotype; ZISP. - Saratov Province • 1 female; Krasnoarmeysky District , 4 km NW of Melovoye; 29 May 2011; K. Samartsev leg.; sparse oak forest; ZISP B0088 .

Distribution.

Israel. Russia: European part. South Korea (new record). Turkey.

Description.

Female. Fore wing length 2.9-3.2 mm. Width of head (dorsal view) 1.8-1.9 × its median length. Transverse diameter of eye (dorsal view) 1.8-2.0 × longer than temple. OOL 1.9-2.9 × Od; POL 1.3-1.7 × Od; OOL 1.3-2.1 × POL. Longitudinal diameter of eye (lateral view) 1.3 × its transverse diameter; hind margins of eye and temple subparallel. Face width 1.4-1.7 × combined height of face and clypeus. Longitudinal diameter of eye 1.7-1.8 × longer than malar space (anterior view). Malar suture absent. Width of hypoclypeal depression 0.85-0.97 × distance from depression to eye. Antenna 1.0-1.2 × as long as fore wing, with 30-33 antennomeres. First, middle and penultimate flagellomeres 1.7-2.0 ×, 1.3-1.6 ×, and 1.8-2.0 × longer than wide, respectively. Mesosoma 1.7 × longer than its maximum height. Mesoscutum setose only on notaulic area. Notauli impressed anteriorly, shallow and not united posteriorly. Mesepimeral sulcus weakly crenulate; metapleural sulcus crenulate. Medio-longitudinal keel on propodeum complete, branching. Fore wing vein r arising before middle of pterostigma; vein 1-R1 1.5-1.6 × longer than pterostigma; marginal cell 10-15 × longer than distance from its apex to apex of wing; vein 3-SR 2.0-2.4 × vein r, 0.55-0.65 × vein SR1, 1.3-1.5 × vein 2-SR. Hind femur 2.8-3.5 × longer than wide. Hind tibia with subapical transverse row of spiny setae. Fifth segment of hind tarsus 0.6-0.9 × and 1.1-1.5 × as long as hind basitarsus and second segment, respectively (see also a remark below). Claws with large rectangular basal lobe. First metasomal tergite with complete dorsal carinae and developed dorsolateral carinae, its median length 0.85-0.95 × its apical width. Second tergite with indistinct median area and with shallow dorsolateral impressions, medially 0.9-1.0 × as long as third tergite; its basal width 1.4-1.8 × its median length. Second metasomal suture deep, strongly curved and crenulate. Apical margins of third to sixth tergites thin. Ovipositor sheath 0.70-0.85 × as long as hind tibia and 0.20-0.25 × as long as fore wing. Apex of ovipositor with weak nodus and distinct ventral serration. Body mostly smooth; face weakly granulate; frons and malar space granulate; propodeum medioposteriorly granulate-rugulose; median area of first tergite posteriorly rugose; second tergite rugose to granulate-rugulose, third-fifth tergites granulate to weakly granulate, sixth tergite almost smooth. Head and mesosoma brownish black, metasoma medio-longitudinally dark brown; lateral parts of metasomal tergites and ventral side of metasoma reddish yellow; legs mostly reddish yellow or middle and hind legs with developed dark brown pattern; maxillary palps yellow; tegulae yellowish brown; wing membrane weakly darkened, pterostigma and veins brown or yellowish brown.

Diagnosis.

Within the section Bracon Orthobracon Fahringer sec. Tobias (1986), B. longigenis is remarkable by the very long malar space (Figs 30 , 33 ), entirely sculptured metasoma with elongate first tergite (Figs 35 , 36 ), and dark-coloured body.

Remarks.

The specimens from South Korea have the apical tarsomere 1.4-1.5 × longer than the second tarsal segment (while in B. longigenis from Europe this ratio is 1.15-1.25) and entirely light-coloured legs (except the brownish hind tarsus; middle and hind legs extensively darkened in B. longigenis from Europe).

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.