Bracon (Bracon) tergalis 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) tergalis Tobias, 2000

Figs 68-76 , A6

Material.

South Korea (20 females, 4 males). - Gangwon-do • 1 female; Goseong-gun, [3] Geojin-eup, Naengcheon-ri , Geonbongsa Temple ; 22 May 1992; D.-S. Ku leg. ; SMNE 1537 • 1 female; Goseong-gun, [5] Toseong-myeon, Sinpyeong-ri , Seoraksan Mountain ; 2 Aug. - 19 Oct. 2002; D.-S. Ku leg. ; Malaise trap; SMNE 778 • 1 female; Yeongwol-gun, [18] Hanbando-myeon, Ssangyong-ri ; 24 May 1993; D.-S. Ku leg. ; SMNE 752 • 1 female; Taebaek-si, [22] Cheoram-dong, Taebaeksan Mountain ; 23 Jun. 1989; D.-S. Ku leg. ; SMNE 753 • 1 female; same data as for preceding; 20 Jun. 1991 ; SMNE 771. - Gyeonggi-do • 1 female; Pocheon-si, [24] Idong-myeon, Dopyeong-ri , Valley Baekun ; 13 Jun. 1996; H.J. Cheon leg. ; SMNE 757 • 1 female; Yangju-si, [29] Nam-myeon ; 12 Jun. 1996; H.J. Cheon leg. ; SMNE 776 • 1 male; Gapyeong-gun, [30] Buk-myeon, Dodae-ri , Myeongjisan Mountain ; 14 Jun. 1992; D.-S. Ku leg. ; SMNE 783 • 1 male; same data as for preceding; ZISP 784 • 1 female; Gapyeong-gun, [31] Cheongpyeong-myeon, Cheongpyeong-ri, Cheongpyeong Amusement Park ; 14 Jun. 1992; D.-S. Ku leg. ; SMNE 781 • 1 female; same data as for preceding; ZISP 782 • 1 male; Suwon-si, [37] Gwonseon-gu, Seodun-dong, Yeogisan Mountain ; 8 Jun. 1994; D.-S. Ku leg. ; SMNE 1057 • 1 female; Suwon-si, [38] Gwonseon-gu, Seodun-dong ; 27-29 Apr. 1994; D.-S. Ku leg. ; Malaise trap; ZISP 1153 • 1 female; same data as for preceding; 25 Apr. 1994 ; SMNE 770 • 1 female; Hwaseong-si, [39] Bibong-myeon ; 1 Jun. 1994; D.-S. Ku leg. ; SMNE 751. - Gyeongsangbuk-do • 1 male; Bonghwa-gun, [40] Seokpo-myeon, Seokpo-ri ; 28 May 1993; D.-S. Ku leg. ; SMNE 779. - Chungcheongnam-do • 1 female; Yesan-gun, [51] Deoksan-myeon, Sudeoksa Temple ; 11 Aug. 1991; D.-S. Ku leg. ; NIBR 1009 • 1 female; Geumsan-gun, [54] Nami-myeon, Boseok Temple ; 5-9 Jun. 1998; Pierre Tripotin leg. ; Malaise trap; SMNE 780. - Chungcheongbuk-do • 1 female; Jecheon-si, [55] Geumseong-myeon, Seongnae-ri ; 10 Jun. 1992; D.-S. Ku leg. ; SMNE 777. - Gyeongsangnam-do • 1 female; Goseong-gun, [64] Sangni-myeon, Bupo-ri ; 3 May 1993; D.-S. Ku leg. ; SMNE 1105 • 1 female; Jinju-si, [72] Gajwa-dong ; 25 Oct. 1993; D.-S. Ku leg. ; SMNE 773 • 1 female; same data as for preceding; 6 Jun. 1993 ; SMNE 774 • 1 female; Jinju-si, [74] Naedong-myeon, Naepyeong-ri ; 30-31 May 1993; D.-S. Ku leg. ; SMNE 772. - Jeollanam-do • 1 female; Gurye-gun, [82] Toji-myeon, Oegok-ri, Jirisan Mountain ( Piagol ); 24 Jan. 1995; S.H. Lee leg. ; SMNE 775.

Additional material.

Russia - Primorskiy Territory • 1 female (holotype); Khasansky District, env. Khasan; 25 May 1979; S.Yu. Storozhenko, V.S. Sidorenko leg.; oak forest; ZISP • 1 female; Lazovsky District , 18 km SE of Lazo, State Reserve of Laso , cordon America; 24-29 Aug. 2006; S.A. Belokobylskij leg.; forest edges, clearings; ZISP A0050 • 1 female; Shkotovsky District , Ussurisky Nature Reserve ; 25 Aug. 2001; S.Yu. Storozhenko and V.S. Sidorenko leg.; ZISP A0042 .

Distribution.

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

Description.

Female. Fore wing length 3.2-4.0 mm. Width of head (dorsal view) 1.7-1.9 × its median length. Transverse diameter of eye (dorsal view) 1.7-2.2 × longer than temple. OOL 2.1-2.7 × Od; POL 0.93-1.83 × Od; OOL 1.5-2.3 × POL. Longitudinal diameter of eye (lateral view) 1.3-1.5 × its transverse diameter; hind margins of eye and temple subparallel. Face width 1.4-1.6 × combined height of face and clypeus. Longitudinal diameter of eye 3.1-3.3 × longer than malar space (anterior view). Malar suture absent. Width of hypoclypeal depression 1.5-1.6 × larger than distance from depression to eye. Antenna 0.75-1.10 × as long as fore wing, with 27-34 antennomeres. First, middle and penultimate flagellomeres 1.8-2.5 ×, 1.4-2.2 ×, and 1.8-2.2 × longer than wide, respectively. Mesosoma 1.5-1.6 × longer than its maximum height. Mesoscutum widely setose on notaulic area and posteriorly, often with sparse setae medio-longitudinally. Notauli deep anteriorly, shallow and united posteriorly. Mesepimeral sulcus smooth, metapleural sulcus crenulate. Medio-longitudinal keel more or less developed in apical third of propodeum, branching. Fore wing vein r arising from basal 0.40-0.48 of pterostigma; vein 1-R1 1.5-1.8 × as long as pterostigma; marginal cell 8.5-13.5 × longer than distance from its apex to apex of wing; vein 3-SR 2.3-2.9 × vein r, 0.52-0.64 × as long as vein SR1, 1.3-1.5 × vein 2-SR. Hind femur 3.4-4.3 × longer than wide. Hind tibia without subapical row of thick setae. Fifth segment of hind tarsus 0.4-0.5 × as long as hind basitarsus and 0.85-1.00 × as long as its second segment. Claws with shortly protruding and blunt basal lobes. First metasomal tergite with incomplete or complete dorsal carina and developed dorsolateral carinae, its median length 0.83-0.96 × its apical width. Second tergite with weak, narrow, longitudinal median area and with more or less deep s-shaped crenulate dorsolateral impressions not bordered by carinae; medially 1.0-1.3 × longer than third tergite; its basal width 1.6-1.8 × its median length. Second metasomal suture deep, curved and crenulate. Apical margins of third-sixth tergites more or less thick. Ovipositor sheath 1.3-1.7 × as long as hind tibia and 0.37-0.49 × as long as fore wing. Apex of ovipositor with weak nodus and weak ventral serration. Body mainly smooth; face and frons weakly granulate, malar space granulate; mesopleuron smooth or partially with weak coriaceous sculpture; propodeum posteriorly almost smooth or weakly granulate; first metasomal tergite laterally weakly rugulose, posteriorly rugose; second tergite striate-rugulose or rugose to rugulose; posterior tergites with weakening papillary-like sculpture. Head, mesosoma and metasoma dorsally brownish black; head ventrally, pronotum, and mesoscutum along notauli, lateral margins of metasoma rusty brown or reddish yellow; tegula and legs brownish yellow; maxillary palps pale yellow; wing membrane weakly darkened, pterostigma brown, wing veins yellowish brown to brown.

Diagnosis.

Bracon tergalis may be compared with B. sergeji and B. semitergalis . The differences between three species are presented in the key below.

1	Face almost smooth, weakly granulate laterally and under toruli (Figs 38 , 41 ). Median area of second metasomal tergite distinct, triangle and elongate (Fig. 44 ). Scape brownish yellow (Fig. 38 ). Median length of first tergite 0.95-1.20 × its apical width (Fig. 42 ). Basal width of second metasomal tergite 1.3-1.6 × its median length (Fig. 44 )	Bracon (Bracon) semitergalis Tobias
-	Face mostly granulate (Figs 50 , 69 , 75 ). Median area of second metasomal tergite weakly defined, longitudinal (Fig. 73 ) or triangle, but short (Fig. 54 ). Scape dark-coloured (Figs 51 , 69 ). Median length of first tergite 0.80-0.95 × its apical width (Figs 54 , 76 ). Basal width of second metasomal tergite 1.6-2.0 × its median length (Figs 53 , 73 )	2
2	Second metasomal tergite with weaker sculpture, rugose to rugulose (Figs 53 , 54 ). Apical margins of third to sixth tergites with shallow weakly crenulate transverse subapical grooves. Transverse pronotal and metapleural sulci smooth (Fig. 52 )	Bracon (B.) sergeji Tobias
-	Second metasomal tergite with coarser sculpture, distinctly longitudinally striate-rugose (Fig. 73 ). Apical margins of third to sixth tergites without subapical grooves. Transverse pronotal and metapleural sulci crenulate	Bracon (B.) tergalis Tobias

Remarks.

The differences between B. tergalis and B. sergeji are very weak, but persistent in the series of specimens of similar size. Because it is possible to separate two species using these characters, we treat them as valid species.

Figures

Figures 68 - 83. Bracon (Bracon) tergalis Tobias, 2000 (68 - 76 holotype, female, ZISP) and B. (B.) virgatus Marshall, 1897 (77, 78, 80, 81 female, SMNE 79, 82, 83 female, ZISP) 68 habitus, dorsal view 69, 78 head, anterior view 70, 80 mesosoma, dorsal view 71 hind tarsus habitus, lateral view 72, 79 head, dorsal view 73, 82 metasoma, dorsal view 74, 83 head, lateral view 75 head, ventrolateral view 76, 83 first metasomal tergite, dorsal view. Scale bars: 0.5 mm (69 - 73, 78 - 83); 1 mm (68, 77).

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.

Figures 37 - 54. Bracon (Bracon) semitergalis Tobias, 2000 (37 - 45 holotype, female, ZISP) and B. (B.) sergeji Tobias, 2000 (46 - 54 paratype, female, ZISP) 37, 48 head and mesoscutum, dorsal view 38, 50 head, anterior view 39, 52 mesosoma, lateral view 40, 46 habitus, lateral view 41 head, ventrolateral view 42 first metasomal tergite, dorsal view 43 metasoma, dorsolateral view 44, 54 first-third metasomal tergites 45, 47 hind tarsus 49 apex of antenna 51 head, lateral view 53 metasoma, dorsal view. Scale bars: 0.5 mm (37 - 40, 41 - 45, 47 - 54); 1 mm (40, 46).