Netelia (Bessobates) nigridorsalis, Konishi, Kazuhiko, 2014

Konishi, Kazuhiko, 2014, A revision of the subgenus Bessobates of the genus Netelia from Japan (Hymenoptera, Ichneumonidae, Tryphoninae), Zootaxa 3755 (4), pp. 301-346 : 324-329

Netelia (Bessobates) nigridorsalis n. sp.

( Figs 69–74 , 80–82 )

Parabatus virgatus: Uchida, 1928: 195 (in part).

Paniscus (Parabates) virgatus f. nipponensis Uchida, 1934: 113 (in part). Netelia (Bessobates) nipponensis: Townes, Momoi & Townes, 1965: 98 (in part).

♀♂. Head ( Figs 70, 71 ) 1.7–1.8 times as wide as long; vertex in dorsal view subangularly rounded; occiput and interocellar area polished and impunctate; vertex and gena weakly and finely punctate; geno-orbital index 2.0–2.3; frons impunctate and finely coriaceous, without a median longitudinal groove; face 1.4–1.6 times as wide as long, strongly and sparsely punctate; supraclypeal suture deep and distinct; clypeus 2.0–2.3 times as wide as long, sparsely punctate on dorsal half and impunctate on ventral half, with apical margin truncate and slightly concave medially; antenna with 47–55 flagellomeres, 1st flagellomere 1.5–1.6 times as long as 2nd, 2nd 2.3–2.6 times as long as wide.

Mesosoma ( Fig. 72 ): mesoscutum 1.2–1.3 times as long as wide; scutellum 1.4–1.7 times as long as distance between lateral carinae at its base, lateral carina fading out before basal 1/4 of scutellum; propodeum weakly transstriate on about basal 0.7, with lateral crest strongly carinate.

Fore tibial spur 0.5–0.6 times as long as the tarsomere, which is 7.1–8.5 times as long as wide; fore tarsal claw with 12–16 (♀) and 16–25 (♂) pectines; hind tarsal claw with 12–14 pectines.

Fore wing ( Fig. 73 ) 2.9–3.1 times as long as wide; areolet pointed or petiolate above; cu-a varying from opposite to distad Rs&M by 1/9 of cu-a length, slightly curved, vertical or slightly reclivous; hind wing ( Fig. 74 ) with 7–11 distal hamuli; nervellar index 0.5–0.7.

Metasoma with 1st tergum 2.6–3.0 times as long as apical width and 1.5–1.6 times as long as 2nd; male subgenital plate ( Fig. 80 ) short with apical margin weakly convex; paramere ( Fig. 81 ) broad, with apical margin obliquely truncate ventrally and apical portion of dorsal margin slightly emarginate; hairs on lamina volsellaris weak; digitus truncate with corners rounded, ventro-apical corner without teeth; membrane of median surface with finely and densely papillate area on subapical portion, area heavily sclerotized; pad short and transverse, situated on subapical portion of paramere near dorsal margin; median subapical sclerotized plate short and transverse, produced anteriorly to form a short overhang; penis valve ( Fig. 82 ) slightly broadened toward apex and strongly curved ventrally; basal apodeme of aedeagus strongly curved dorsally.

Head yellow; interocellar area to upper portion of occiput with blackish-brown marking diverging ventrally and occiput with blackish-brown spot on each side of foramen; antenna light brown. Mesosoma yellow; mesoscutum with brownish-black stripe on each of median and lateral lobes and a brownish-black spot situated behind median stripe; post scutellum and propodeum anterior to propodeal crest brown to blackish-brown; pronotum sometimes with a brown spot on posterior portion near hind corner. Legs brownish-yellow; hind coxa and femur brown to blackish-brown, latter yellowish on ventral surface; hind tarsus whitish-yellow. Wings hyaline, tinged with yellow; vein C and pterostigma of fore wing brownish-yellow, other veins blackish brown. Metasoma brown on tergites, brownish-yellow on episterna and sterna; basal 1/3 and apical margin of 1st tergite and basal corner of 2nd tergite ochraceous; male genitalia brown.

Ovarian egg 1.0 mm long and 0.5 mm high, with a stalk on posterior end of ventral margin.

Length of fore wing: 13.0– 17.8 mm.

Holotype: ♂, Mt. Shiratoriyama (1300 m), Kumamoto Pref., 9. vii. 1983 (N. Kôda), at light, NIAES.

Paratypes: Japan: [Hokkaido] 2♂ (12. viii. 1970, T. Kumata) & 1♂ (28. vii–3. viii. 1975, M. Suwa et al.), Ginsendai, Mt. Taisetsuzan, SEHU; 3♀ 2♂, Nissho-tôge, Hidaka, 31. vii–1. viii. 1986 (S. Nomura, at light), NIAES. [Honshu] Niigata Pref.: 1♀ 10♂, Tsubame spa, 15. viii. 1981 (K. Baba), NIAES. Tochigi Pref.: 1♀, Chûzenji, Nikko, 16. ix. 1923 (E. Gallois), recorded as Parabatus virgatus by Uchida (1928), SEHU. Gifu Pref.: 2♀, Shinhodaka-onsen, 26. viii. 1984 (Y. Nakata, at light), NIAES. Yamanashi Pref.: 1♂, Jigokudani, Mt.

Yatsugatake, 8. vii. 1982 (S. Naomi), NIAES; 2♀, Kiyosato, Oizumi, 19. vii. 1984 (S. Nomura et al., at light), NIAES; 1♂, Nakamaru, Nagasaka, 17. vii. 1984 (S. Nomura et al., at light), NIAES; 1♂, Daibosatsu-tôge, 12. vii. 1969 (H. Takizawa), KUIC; 1♂, Mt. Nyugasa, 10. viii. 1961 (A. Nakanishi), MNHA. Nara Pref.: 1♂ (4–6. vii. 1932, C.Teranishi, allotopotype of Paniscus (Parabates) virgatus f. nipponensis Uchida, 1934 , SEHU), 1♂ (13–14. vii. 1983, S. Ito, NIAES) & 1♂ (25. vi. 1984, K. Konishi, at light, NIAES), Odaigahara; 1♂, Mt. Hokozan, 30. vii. 1983 (Y. Syôno, at light), NIAES. Hiroshima Pref.: 4♂, Mt. Azumayama, Hiwa, 23. ix. 1984 (K. Konishi et al., at light), NIAES; 2♂, Mt. Shinnyusan, Togauchi, 2. vi. 1983 (K. Konishi et al., at light), NIAES. [Shikoku] Tokushima Pref.: 1♂, Mt. Takashiroyama, 14. viii. 1986 (K. Ôhara et al., at light), TKPM; 2♂, Nikubuchidani, Ichinomori (1200 m), 23. viii. 1986 (K. Ôhara et al., at light), TKPM; 3♂, Minokoshi (1400 m), Mt. Tsurugisan, 17. viii. 1986 (K. Ôhara et al., at light), TKPM; 1♀ 3♂, Mt. Tsurugisan (1600 m), 18. vi. 1981 (I. Kanazawa, at light), NIAES. Ehime Pref.: 1♂, Tsuchigoya, Mt. Ishizuchi, 26. vii. 1971 (Y. Arita), ZLMU. Kochi Pref.: 2♀ 1♂, Nishikuma, Mononobe, 9. vii. 2000 (I. Yamashita, at light), NIAES; 7♂ (21. viii. 1999), 7♂ (25. vi. 2000), 7♂ (20. vii. 2000), 5♂ (4. viii. 2000) & 4♂ (14. viii. 2000), Tengu-kôgen, Higashitsuno, (I. Yamashita, at light), NIAES; 1♂, Mt. Inamura, Hongawa, 13. viii. 2000 (I. Yamashita, at light), NIAES; 10♂ (22. vii. 1989, I. Yamashita), 3♂ (25. vii. 1991, I. Yamashita), 3♂ (10. vii. 1993, I. Yamashita), 2♂ (1. vii. 1995, K. Konishi et al.) & 1♀ 5♂ (1. vii. 2000, I Yamashita), Teragawa, Hongawa, (at light), NIAES. [Kyushu] Fukuoka Pref.: 1♂ (5. vii. 1983, R. Noda) & 1♂ (6. ix. 1984, K. Konishi), Mt. Hikosan, (at light), NIAES. Oita Pref.: 2♀, Mt. Daisenzan, Mts. Kuju, 27. v. 1983 (R. Noda), NIAES; 1♀, Daisen-rindo, Mts. Kuju, 5. viii. 1979 (K. Konishi), NIAES; 1♂, Yoshibu, Mts. Kuju, 29. viii. 1981 (F. Sugita), NIAES; 1♀ 2♂, Chojabaru, Mts. Kuju, 22. v. 1983 (Y. Abe et al., at light), NIAES; 3♂ (28. v. 1983, Y. Nakata et al.) & 2♀ (3. x. 1983, N. Kôda et al.), Mt. Kurodake, Mts. Kuju, (at light), NIAES. Kumamoto Pref.: 1♀ 1♂ (18. vi. 1978, H. Makihara) & 3♀ 4♂ (10–24. viii. 1978, K. Yamagishi), Mt. Asosan, (light trap), KUEC; 2♀ (12. v. 1983, N. Kôda et al.), 1♂ (9. vii. 1983, N. Kôda), 1♀ 1♂ (19. vii. 1983, K. Konishi et al.) & 1♀ 1♂ (26. viii. 1983, N. Kôda et al.), Mt. Shiratoriyama (1300 m), (at light), NIAES.

Korea: 1♀, Choanji, 3. viii. 1924 (T. Kurisue), recorded as Parabatus virgatus by Uchida (1928), SEHU.

Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu), Korea.

Etymology. The specific name is based on the darker coloration of dorsal portions of the meso- and metasoma.

Remarks. This new species resembles the moderately pigmented specimens of N. (B.) virgata in coloration, but easily distinguished from it by the vertex which is subangularly rounded off in dorsal view, the short lateral carina of scutellum and the presence of propodeal crest. Nigridorsalis shares the shape of vertex with kiuhabona , and the shape of digitus and the small hairs on lamina volsellaris with cristata . However, the presence of overhang, strip of minutely papillate cuticle and the membranous pad are shared with virgata . Thus, this species is thought to be a member of the virgata group.

Figures

FIGURES 69 – 72. Netelia (Bessobates) nigridorsalis. 69, Female; 71 – 73, male; 69, habitus in lateral view; 70, head in dorsal view; 71, head in frontal view; 72, mesosoma in dorsal view.

FIGURES 73 – 74. Wings of male of Netelia (Bessobates) nigridorsalis. 73, Fore wing; 74, hind wing.

FIGURES 80 – 85. Male subgenital plate and genitalia of Netelia (Bessobates) spp. 80 – 82, Netelia (Bessobates) nigridorsalis; 83 – 85, N. (B.) nodai; 80, 83, subgenital plate; 81, 84, paramere in mesal view; 82, 85, aedeagus in lateral view.