Exetastes fuKuchiyamanus Uchida, 1928

Watanabe, Kyohei & Sheng, Mao-Ling, 2018, Taxonomic notes on Exetastes fukuchiyamanus Uchida, 1928 (Hymenoptera, Ichneumonidae, Banchinae), with description of a new species from Japan and China, Zootaxa 4399 (2), pp. 281-288 : 285-287

Exetastes fuKuchiyamanus Uchida, 1928

( Figs 14–18 )

Exetastes fukuchiyamanus Uchida, 1928: 270 .

Description. Female (n=12). Body length 11.0– 14.5 mm.

Head 0.5–0.6 × as long as wide, covered with dense punctures and dark brown setae. Clypeus 0.5 × as long as wide, slightly convex in lateral view. Face 0.5 × as long as wide, convex medially ( Fig. 15 ). Length of malar space 0.5–0.6 × as long as basal mandibular width. Mandible not strongly twisted. OOL 0.7–0.9 × as long as POL. Antenna with 74–79 flagellomeres. FL1 2.0–2.2 × as long as FL2. Apical flagellomeres not widened, length more than width (or same).

Mesosoma covered with dense punctures and dark brown setae. Epomia absent. Pleural carina of propodeum entirely strong. Propodeum covered with irregular rugae, with a pair of longitudinal ridges medially, with a pair of sublateral convexities. Fore wing length 10.0– 11.5 mm. Vein 1m-cu with a ramulus. Areolet large, receiving vein 2m-cu at middle. Vein Rs strongly sinuate basally. Hind femur 6.4–6.9 × as long as maximum depth in lateral view. Longest spur of hind tibia shorter than half length of first tarsomere. Hind first tarsomere 2.2–2.3 × as long as second tarsomere. Tarsal claws pectinate.

Metasoma weakly polished, more or less shagreened, covered with fine and sparse punctures, dull surface ( Fig. 16 ). T1 2.4–2.6 × as long as maximum width, covered with minute and transverse striae basally. T2 1.0–1.1 × as long as maximum width. T4-T7 weakly compressed. Ovipositor sheath 0.3 × as long as hind tibia, weakly widened apically, covered with brown setae.

Colouration ( Figs 14–16 ). Body (excluding wings and legs) black, except for: clypeus sometimes tinged with whitish-brown ventrally; mandible with whitish-yellow spot dorsomedially; mandibular teeth tinged with reddishbrown; antenna with a median white band; medial part of collar sometimes tinged with whitish-yellow; subalar prominence sometimes tinged with reddish-brown; scutellum with a yellow spot; ovipositor reddish-brown. Wings hyaline. Veins and pterostigma blackish-brown except for yellowish-brown wing base. Legs black to blackishbrown except for: fore and mid femora, tibia and tarsus partly tinged with brown to yellowish-brown; apical part of second tarsomere, third and fourth tarsomeres whitish-yellow to white. Sometimes apical part of hind first tarsomere also whitish-yellow to white.

Male (n=112). Similar to female. Face 0.5–0.6 × as long as wide. OOL 0.9–1.0 × as long as POL. Length of malar space 0.5–0.7 × as long as basal mandibular width. Antenna with 65–71 flagellomeres. FL1 1.7–1.8 × as long as FL2. Hind femur 7.0–7.3 × as long as maximum depth in lateral view. Hind first tarsomere 2.2–2.4 × as long as second tarsomere. T1 2.4–2.7 × as long as maximum width. Punctures on metasomal tergites denser than female. Clypeus yellow to whitish-yellow dorsally ( Fig. 18 ). Face with a pair of yellow to whitish-yellow stripes along inner margin ( Fig. 18 ). Mandible with a large whitish-yellow area basally ( Fig. 18 ). Ventral surface of scape sometimes yellow to whitish-yellow. Yellow area on collar larger than female but not as enlarged as in E. compressus sp. nov. Posterodorsal corner of pronotum, subalar prominence and tegula whitish-yellow ( Fig. 17 ). Fore and mid coxae and trochanters with a conspicuous whitish-yellow marking. Hind fifth tarsomere yellow to whitish-yellow ( Fig. 17 ). Posterior margin of metasomal tergites sometimes tinged with reddish-brown. Fore and mid legs paler than female ( Fig. 17 ).

Specimens examined. JAPAN: 1 ♀, Aomori Pref., Mt. Iwaki , 28. IX. 1983, M. Miyazaki leg. ( NIAES) ; 1 ♂, Iwate Pref., Mt. Hayachine , 3–10. IX. 1989, M. Sharkey & H. Makihara leg. (MT) ( NIAES) ; 1 ♂, Fukushima Pref., Kitaaizu Vil., Sanbonmatsu , 1. X. 1994, S. Sakurai leg. ( NIAES) ; 1 ♀, Tochigi Pref., Nasushiobara City, Enna- Skyline , 15. X. 2009, E. Katayama leg. ( KPMNH) ; 6 ♂, Tochigi Pref., Nasushiobara City, Shiobara, Tashiro , 2–9. X. 2008, T. Matsumura leg. (MT) (4 ♂, KPMNH; 2 ♂, GSFPM) ; 1 ♂, Tochigi Pref., Nasushiobara City, Dodaira , 10–18. IX. 2008, T. Matsumura leg. (MT) ( KPMNH) ; 1 ♀ & 4 ♂, Ibaraki Pref., Kitaibaraki, Ogawa , 17. IX. – 1. X. 1996, K. Maeto leg. (MT) ( NIAES) ; 41 ♂, same data except for 1–15. X. 1996 ( NIAES) ; 3 ♀ & 3 ♂, same data except for 15–30. X. 1996 ( NIAES) ; 1 ♂, Saitama Pref., Yorii Town, Gonotsubo , 16. X. 1978, T. Nambu leg. ( KPMNH) ; 1 ♀, Saitama Pref., Yorii , 30. X. 1977, T. Nambu leg. ( NIAES) ; 1 ♀, same data except for 10. X. 1979 ( NIAES) ; 1 ♂, same data except for 15. X. 1979 ( NIAES) ; 1 ♂, Saitama Pref., Otaki, Mt. Mitsumine , 6. X. 1974, K. Hara leg. ( NIAES) ; 2 ♂, Saitama Pref., Chichibu , 2. XI. 1974, T. Nambu leg. ( NIAES) ; 1 ♂, Tokyo, Takaosan , 11. X. 2600 (=1940), J. Yoshioka leg. ( NSMT) ; 1 ♂, Tokyo, Fuchu , VII. 1947, T. Ishii leg. ( NIAES) ; 2 ♀, Aichi Pref., Mt. Sanage , 20–26. XI. 1992, K. Kato leg. ( NIAES) ; 1 ♀, same data except for 30. X. – 5. XI. 1992 ( NIAES) ; 1 ♀, same data except for 4–12. XII. 1992 ( NIAES) ; 1 ♀, same data except for 6–12. XI. 1992 ( NIAES) ; 1 ♀ (holotype), Kyoto Pref., Fukuchiyama , 1925, K. Fukuda leg. ( SEHU) ; 1 ♀, Tottori Pref., Mt. Daisen , 15. X. 1981, T. Goto leg. ( NIAES) ; 1 ♂, Ehime Pref., Mt. Odamiyama, Namakusadani , 18. X. 1994, E. Yamamoto leg. ( NIAES) ; 2 ♀, Ehime Pref., Kumakogen , 10. IX. 2007, E. Yamamoto leg. (MT) (EUM) ; 1 ♀, same locality and collector, 30. XI, 2007 (EUM) ; 1 ♀, Fukuoka Pref., Mt. Hiko , 24–26. X. 1979, K. Maeto leg. ( NIAES) ; 1 ♂, Fukuoka Pref., Wakamiya Town, Innakiyama , 21. X. 1993, R. Matsumoto leg. ( OMNH) ; 1 ♀, same data except for 25. X. 1993, R. Matsumoto leg. ( OMNH) ; 1 ♀, Fukuoka Pref., Mt. Hiko , 24–26. X. 1979, K. Maeto leg. ( NIAES) ; 1 ♂, Oita Pref., Shonai Town, Asono , 10. X. 1995, R. Matsumoto leg. ( OMNH) ; 2 ♀ & 2 ♂, same data except for 5. X. 1996 ( OMNH) ; 1 ♂, “ Ippekiko ”, 27. X. 2612 (=1952), J. Yoshioka leg. ( NSMT). CHINA: 1 ♀, Xinbin , Liaoning, 10. IX. 2009, IT ( GSFPM) ; 1 ♂, Xinbin , Liaoning, 29. IX. 2009, IT ( GSFPM) ; 1 ♂, Benxi , Liaoning, 20. VIII. 2014, IT ( GSFPM) ; 3 ♂, Kuandian , Liaoning, 26. VIII. 2015, IT ( GSFPM) ; 1 ♂, Kuandian , Liaoning, 3. IX. 2015, M.- L. Sheng leg ( GSFPM) . 4 ♀ & 39 ♂, Shennongjia , Hubei, 22. VIII. – 10. X. 2011, IT ( GSFPM).

Distribution. Japan (Honshu, Shikoku and Kyushu), China (Hubei and Liaoning), and Far East Russia.

Bionomics. The host is unknown. All adult wasps collected in autumn.

Remarks. The above distribution record from Russia is based on Kuslitzky (2007).

Figures

FIGURES 14–18. Exetastes fukuchiyamanus Uchida, 1928, female (14–16) and male (17, 18)—14, 17, lateral habitus; 15, 18, head, frontal view; 16, T2, dorsal view.