Stilbops kunashiricus Kasparyan, 1999

Watanabe, Kyohei & Maeto, Kaoru, 2012, Taxonomic study of the genus Stilbops Förster from Japan (Hymenoptera: Ichneumonidae: Stilbopinae), Zootaxa 3456, pp. 51-81 : 68-73

Stilbops kunashiricus Kasparyan, 1999

( Figs. 2 F, M, 3 F, L, 4 F, K, 5 F, 6 F, 7 F, 8 F, 9 F, G, 10 F, 11 G, H, 12 I, J, 13, 14 A)

Stilbops orientalis Kasparyan, 1984: 142 . In part, miss identified. Stilbops kunashiricus Kasparyan, 1999: 167 .

Diagnosis. Anterior tentorial pit small ( Fig. 2 F), its margin not concealed by setae; lower end of occipital carina effaced ( Fig. 4 F); lower part of gena with concavity in lateral view ( Fig. 3 F); lower margin of pronotum angulate ( Fig. 5 F); lateral part of pronotum without large smooth area ( Fig. 5 F); lateromedian longitudinal carina absent except for base; lateral margin of T1 straight basally; metasomal tergites usually partly reddish-brown or red, or sometimes largely black; tegula yellow.

Description. Female (n=135). Body length 5.5–6.6 mm; length of fore wing 4.5–5.3 (Original description: 4.5) mm.

Head 0.6 times as long as wide; clypeus 0.6 times as long as wide, narrowly punctate dorsally, center part of apical half more or less with longitudinal striae or shagreened, its margin convex to subtruncate in anterior view ( Fig. 2 F); anterior tentorial pit small ( Fig. 2 F), its margin not concealed by setae; face 0.7 times as long as wide, punctures on center part longitudinally elongated; frons covered with punctures, area above antennal sockets transversely striated by coalescent punctures, and with longitudinal smooth area medially ( Fig. 2 M); OOL 1.0–1.4 times as long as OD; POL 1.0–1.3 (Original description: 1.1) times as long as OD; lower end of occipital carina effaced ( Fig. 4 F); GOI 0.3; lower part of gena with strong concavity in lateral view ( Fig. 3 F); malar space 0.8 times as long as basal width of mandible; mandibular base flat ( Fig. 3 L). Antenna with 21–23 (Original description: 20) flagellomeres; flagellomere I 1.1–1.2 times as long as II, and terminal flagellomere 2.2–3.0 (Original description: 2.2) times as long as preceding one; sensilla placodea present on flagellomere III and following all flagellomeres.

Mesosoma ( Figs. 5 F, 6 F, 7 F, 8 F): ventral margin of pronotum angulate ( Fig. 5 F); upper end of epomia distant from upper margin of pronotum in lateral view ( Fig. 5 F); lateral area of pronotum punctate except for small smooth area on lower 0.2–0.3 ( Fig. 5 F); mesoscutum with weak notaulus on anterior 0.3; smooth area around episternal scrobe rather small; upper end of epicnemial carina reaching lower 0.2 of pronotum; juxtacoxal carina absent ( Fig. 5 K); lateral longitudinal, pleural and posterior transverse carinae of propodeum weakly present ( Fig. 8 F); anterior transverse carina present except for median part ( Fig. 8 F); lateromedian longitudinal carina present only anterior part, its coalescent ( Fig. 8 F); areas of propodeum not defined, punctate, and with small smooth spots on center of area superomedia (place if defined) and lateral parts of area dentipara (place if defined).

Fore wing: Cu-a distant from Rs&M by 0.4–0.8 times length of Cu-a; ICI 0.7–1.1. Hind wing: NI 5.0–10.0; one basal hamulus, 4–6 (usually 5 or 6) distal hamuli.

Hind femur 5.3–5.8 times as long as deep in lateral view; hind tibia 9.0–9.6 times as long as deep in lateral view; hind tarsomere ratio I; II; III; IV; V = 3.0; 1.3–1.4; 1.0; 0.6; 0.8–0.9.

Metasoma: TI 1.5–1.6 (Original description: 1.5) times as long as maximum width, with median dorsal carina on anterior 0.4, without distal depression, and lateral margin straight basally ( Fig. 10 F); TII and TIII without round convexities; subgenital plate smooth. Ovipositor straight ( Fig. 11 K); ovipositor sheath 0.5–0.6 (Original description: 0.55) times as long as hind tibia.

Coloration ( Figs. 6 F, 7 F, 9 F, G, 12 I): body (excluding legs) black, except for: yellow mandible except for black teeth and base; antenna blackish-brown with ventral side yellow to yellowish brown; yellow palpi; yellow tegula; stigma with yellowish brown, its margin dark brown; wing veins dark-brown except for yellow of extreme wing base; apex of T1 and following all tergites reddish brown to red; sternites yellow in membranous part, remainder sometimes tinged brown to reddish-brown; ovipositor sheath dark brown to black except for yellow apex; ovipositor yellowish-brown to brown. Legs yellowish-brown to brown, except for: fore and mid coxae (except for brown base), trochanters and trochantelli yellow; black hind coxa with yellow apex; hind trochanter and trochantellus yellow; hind tibia brown to black extreme apex; hind tarsus dark brown to black with narrow yellow base. Fore and mid coxae sometimes with small brown spot. Red area of metasomal tergites sometimes varied reddish-brown ( Fig. 9 F) to almost black (red area present only lateral and/or posterior margin) ( Fig. 9 G) (specimens with black metasoma usually collected in southern localities, especially Shikoku and Kyushu including Tsushima Is.).

Male (n=231). Similar to female: body length 5.6–6.5 mm; length of fore wing 4.6–4.9 mm. Face 0.8 times as long as wide; OOL 0.6–0.8 times as long as OD; POL 0.8–1.2 times as long as OD; malar space 0.6 times as long as basal width of mandible. Antenna with 25–27 flagellomeres; flagellomere I 1.2–1.4 times as long as II, and terminal flagellomere 1.2–2.0 times as long as preceding one; sensilla placodea present all flagellomeres. Base of lateromedian longitudinal carina not united. Five or six distal hamuli. Hind femur 5.5–6.0 times as long as deep in lateral view; hind tibia 9.0–9.2 times as long as deep in lateral view; hind tarsomere ratio I; II; III; IV; V = 3.0; 1.3; 1.0; 0.6–0.7; 0.8. TI 1.9–2.0 times as long as maximum width; inner margin of paramere weakly concave apically in ventral view ( Fig. 11 G).

Coloration similar to female ( Fig. 12 J), differing as follows: yellow part of mandible large; antennae except for basal part entirely blackish-brown; red part of metasomal tergites darkened.

Specimens examined. (135Ƥ 23133): [Hokkaido] 1Ƥ, Hokkaido pref., Rishiri Is., Rishiri town, Mikaeridaikoen, 16–18. vii. 2001, K. Uesugi and T. Yoshida leg., Malaise trap (SEHU); 4Ƥ, Toyotomi town, Kabutonuma, 12. vii. 1980, K. Maeto leg. (NIAES); 2Ƥ, same data except for collector is H. Takemoto (NIAES); 1Ƥ, Tokachi, Koshunai, 200m alt., 3. vii. 1989, M. Sharkey leg. (AEI); 1Ƥ, Minamifurano town, Kanayama, N43°07’ E142°24’, 2–3. vii. 2003, T. Yoshida leg. (SEHU); 3Ƥ, Ebetsu city, 17. vii. 1980, K. Maeto leg. (NIAES); 1Ƥ, same locality, 24. vi – 4. vii. 1992, K. Konishi leg., Malaise trap (NIAES); 13, Sapporo, 5. vii. 1954, Townes Family leg. (AEI); 1Ƥ, same locality and collector, 6. vii. 1954 (AEI); 1Ƥ, same locarity and collector, 9. vii. 1954 (AEI); 1Ƥ, Sapporo, 14. vii. 1954, David Townes leg. (AEI); 1Ƥ, Sapporo, 1–14. vii. 1989, K. Maeto & M. Sharkey leg. (AEI); 1Ƥ, same locality and collector, 2–7. 1989 (AEI); 2Ƥ 933, Jozankei, 10. vii. 1954, Townes Family leg. (AEI); 1Ƥ, Sapporo city, Jozankei, 350 m, 20–31. vii. 1989, K. Maeto and M. Sharkey leg., Malaise trap (NIAES); 1Ƥ, Sapporo city, Hitsujigaoka, N43°00’ E141°24’, 15–25. vi. 2003, K. Konishi leg., Malaise trap (NIAES); 5Ƥ, same data except for collected in 2–9. vii. 2003 (NIAES); 1Ƥ, same data except for collected in 9–16. vii. 2007 (NIAES); 2Ƥ, same data except for collected in 16–23. vii. 2003 (NIAES); 2Ƥ, same data except for collected in 23–30. vii. 2003 (NIAES); 6Ƥ 13, same data except for collected in 14–21. vi. 2007 (NIAES); 4Ƥ, same data except for collected in 21–28. vi. 2007 (NIAES); 1Ƥ, same data except for collected in 28. vi – 5. vii. 2007 (NIAES); 2Ƥ, same data except for collected in 5–12. vii. 2007 (NIAES); 3Ƥ, same data except for collected in 12–19. vii. 2003 (NIAES); 2Ƥ, same data except for collected in 19–26. vii. 2007 (NIAES); 1Ƥ, same data except for collected in 26. vii – 2. viii. 2007 (NIAES); 1Ƥ, same data except for collected in 19–26. vi. 2009 (NIAES); 1Ƥ, same data except for collected in 26. vi. – 3. vii. 2009 (NIAES); 1Ƥ, same data except for collected in 17–24. vii. 2009 (NIAES); 1Ƥ, Mt. Tarumae-san, 12–21. vii. 1998, K. Konishi leg., Malaise trap (NIAES); 2Ƥ 13, same data except for collected in 21–26. vii. 1998 (NIAES); 5Ƥ, Kenichi-gawa, Iwafuchi-zawa, 1–10. vii. 1995, Y. Ito and T. Ito leg., Malaise trap (NIAES); 1Ƥ, Sapporo city, Kannon-zawa, 26. vi. 2002, T. Yoshida leg. (SEHU); 1Ƥ, same locality, 3–16. vii. 1992, N. Kuhara leg., Malaise trap (NIAES); 3Ƥ, Sapporo city, Maruyama, 13. vii. 1980, K.

Maeto leg. (NIAES); 13, Tomakomai, 26. vi. 1996, Y. Sakamaki leg., Light trap (SEHU); 1Ƥ, same locality, 31. vii. 1996, M. Sueyoshi leg. (OMNH); 1Ƥ, Tomakomai, Lake Utonaiko, 26. vi. 1996, M. Matsuda leg. (SEHU); 1Ƥ, Tomakomai city, Uenae, 19. vi. 2006, K. Watanabe leg. (TUA); 2Ƥ 433, Tomakomai city, Exp. Forest of Hokkaido University, 18–20. vi. 1980, K. Maeto leg. (NIAES); 1Ƥ833, same data except for collector is H. Takemoto (NIAES). [Honshu] 2Ƥ, Aomori Pref., Aomori city, Yokouchi-Yaegiku, 20. vi. 1992, T. Ichita leg. (NIAES); 1Ƥ, Aomori pref., Aomori city, Nanamagari, 18–25. vii. 1992, T. Ichita leg., White sticky trap (NIAES); 13, Aomori Pref., Aomori city, Igurisawa, 5. vii. 1992, T. Ichita leg. (NIAES); 13, same locality, 28. vi. 1992, T. Ichita leg. (NIAES); 13, Aomori Pref., Towada town, Tsuta, 27. vi. 1992, T. Ichita leg. (NIAES); 13, Iwate Pref., Mt. Hayachine, Kawaranobo, 16. vii. 1985, K. Konishi leg., Light trap (NIAES); 1Ƥ, Iwate Pref., Mt. Hayachine, 400m, 5–11. vii. 1989, M. Sharkey and H. Makihira leg. (NIAES); 3Ƥ 13, Yamagata Pref., near Mts. Iide, Budosawa, 29–30. vi. 1987, K. Konishi leg. (NIAES); 433, Fukushima Pref., near Mts. Iide, Kawairi, 27–28. vi. 1987, K. Konishi leg., Light trap (NIAES); 2Ƥ 233, Fukushima Pref., Mts. Adatara, Yokomuki, 9–10. vii. 1985, K. Konishi leg. (NIAES); 2Ƥ, Fusushima Pref., Showa vil., Mt. Hakase, 1000m alt., 1–28. vi. 1998, T. Muroi leg., Malaise trap (MU); 7Ƥ, same locality and collector, 29. iv. –26. vii. 1998 (MU); 1Ƥ, Tochigi Pref., Yaita, 30. vi–15. vii. 1989, K. Konishi leg., Malaise trap (NIAES); 13, Gunma Pref., Mt. Akagiyama, 18. vi. 1980, M. Hayashi leg., at light (NIAES); 13, Saitama Pref., Iruma city, iv. 1972, M. Shimoda leg. (NIAES); 13, Tokyo Pref., Hinohara vil., Mt. Syotosan, 950 m, 1–2. vi. 1988, S. Saito leg. (NIAES); 13, Tokyo Pref., Oume city, Mt. Mitakesan to Hatonosu station, 300–800 m, N35°47’ E139°8’, 1. vi. 2008, A. Sakai leg. (TUA); 7Ƥ 333, Kanagawa Pref., Fujino town, Mt. Jinbayama, 700–830 m, N35°39’9" E139°9’55", 7. vi. 2008, K. Watanabe leg. (TUA); 1Ƥ, Yamanashi Pref., Koushu city, Katsunuma town, near Ootaki-fudou, 9. vi. 2007, K. Watanabe leg. (TUA); 13, Nagano Pref., Kamikochi, 22. vii. 1954, Townes Family leg. (AEI); 1Ƥ, same locality and collector, 24. vii. 1954 (AEI); 13, Nagano Pref., Kitaazumi-gun, Mt. Hakubadake, Kitamata, 1170 m, 7. vii. 1982, Y. Yoshida and S. Yoshimatsu leg., Light trap (NIAES); 2Ƥ, Nagano Pref., Azumi vil., Shimashima-dani, 15. vii. 1997, R, Matsumoto leg. (OMNH); 1Ƥ, Shizuoka Pref., Shizuoka city, Umegashima, 1150m alt., 23. vii. 2001, T. Sugiyama leg., (YPT) (NIAES); 233, Shizuoka Pref., Honkawane town, Mt. Yamainudan, 1200–1400 m, N35°7’48" E138°2’19", 14. vi. 2008, K. Watanabe leg. (TUA); 433, Shizuoka Pref., East Izu, Mt. Iwamuro, 5. v. 1968, T. Maenami leg. (NIAES); 2133, same data except for collected in 12. v. 1968 (NIAES); 2Ƥ 833, same data except for collected in 29. v. 1968 (NIAES); 2Ƥ 433, Shiga Pref., Shiga town, Hirasan-Yakumogahara, 16. vi. 1999, R. Matsumoto leg. (OMNH); 1Ƥ, Kyoto Pref., Kyoto city, Hanase-toge, 1. vi. 2000, R. Matsumoto leg. (OMNH); 333, Hyogo Pref., Sekinomiya town, Mt. Hyonosen, 670 m, 31. v. 1983, S. Yoshimatsu, K. Konishi and Y. Yoshida leg., Light trap (NIAES); 13, Hyogo Pref., Sekinomiya town, Mt. Hyonosen, 1. vi. 1983, K. Konishi leg. (NIAES); 233, Tottori Pref., Mt. Daisen, Daisenji, 800 m, 29. v. 1983, S. Yoshimatsu, K. Konishi and Y. Yoshida leg., Light trap (NIAES). [Shikoku] 13, Tokushima Pref., Mt. Tsurugi-san, 1600 m, 19. vi. 1981, I. Kanazawa leg. (NIAES); 1Ƥ, same data except for collected in 20. vi. 1981 (NIAES); 3Ƥ 3233, Tokushima Pref., Mt. Tsurugi-san, 20. vi. 1989, I. Kanazawa leg. (NIAES); 4Ƥ 2233, same locality, 19–20. vi. 1981, S. Naomi leg. (NIAES); 2Ƥ, Tokushima Pref., Sanagouchi vil., Mt. Asahigamaru, 900m alt., 4–13. vi. 2002, K. Ohara leg., Malaise trap (MU); 3Ƥ 833, Ehime Pref., Matsuyama city, Komenono, Shiratsue, 20. vi. 2006, K. Takasuka leg. (ELEU); 13, Ehime Pref., Matsuyama city, Komenono, 3–4. vi. 2006, K. Takasuka leg. (ELEU); 13, Ehime Pref., Saijo city, Nanokawa-goe, 18. vi. 2005, K. Takasuka leg. (ELEU); 13, Kochi Pref., Hongawa vil., Teragawa, 1. vii. 2000, I. Yamashita leg., Light trap (NIAES); 1Ƥ, same data except for collected in 16. vii. 2000 (NIAES); 933, Kochi Pref., Higashisuno vil., Tengu-kogen, 25. vi. 2000, I. Yamashita leg., Light trap (NIAES); 733, same locality, 12. vi. 1995, Y. Okushima leg. (OMNH). [Kyushu] 233, Fukuoka Pref., Fukuoka city, Sefuriyama, 8. vi. 1996, R. Matsumoto leg. (OMNH); 8Ƥ 2633, same locality and collector, 6. vi. 1999 (OMNH); 1Ƥ, Fukuoka Pref., Maebaru city, Raizan, 20. vi. 1995, R. Matsumoto leg. (OMNH); 13, Nagasaki Pref., Tsushima Is., Waita, 2. vi. 1996, R. Matsumoto leg. (OMNH); 13, Nagasaki Pref., Tsushima Is., Mitake, 2. vi. 1996, R. Matsumoto leg. (OMNH); 13, Oita Pref., Mts. Kuju, Mt. Kurodake, 17. v. 1982, N. Koda leg., Light trap (NIAES); 233, Kumamoto Pref., Izumi vil., Mt. Hakucho-zan, 1300 m, 7. vi. 1980, N. Koda leg. (NIAES); 1933, Kumamoto Pref., Shiiya-toge, 1400 m, 15. vi. 1985, K. Konishi et al. leg., Light trap (NIAES); 13, same locality, 16. vi. 1985, T. Goto leg. (NIAES); 233, Kunamoto Pref., Izumi vil., Momiki, 9. vi. 1994, K. Tenma leg., Light trap (OMNH); 1Ƥ, Miyazaki Pref., Takaharu town, Miike, 20. v. 1982, K. Konishi leg. (NIAES); 3Ƥ, same data except for collector is H. Takemoto (NIAES); 233, Kagoshima Pref., Kurino town, Kurinodake-onsen, 19. v. 1982, K. Konishi and H. Takemoto leg., Light trap (NIAES); 13, same locality, 12. iv. 1983, K. Konishi and S. Yoshimatsu leg., Light trap (NIAES).

Distribution. Japan (Kunashiri Is., Rishiri Is., Hokkaido, Honshu, Shikoku, Kyushu and Tsushima Is.) ( Fig. 13 ).

Remarks. This species is closely similar to orientalis Kasparyan in the characters of head and coloration, and can be distinguished from the latter by the malar space 0.8 times as long as basal width of mandible in female (0.9– 1.0 times in orientalis ), the dense punctures on lateral part of pronotum behind epomia (sparse in orientalis ), the partly effaced propodeal carinae (completely present in orientalis ), the largely punctuated propodeum (relatively smooth S. orientalis smoother), the yellow tegula (black in orientalis ). This species also closely resembles auster sp. nov. and michinokuensis sp. nov., and can be easily distinguished from them (see remarks of auster and michinokuensis ). In Japan, this species is the most common species of Stilbops and usually collected at the shade or edge of various forests ( Fig. 14 A).

Figures

FIGURE 2. Heads of Stilbops, frontal view. — A, K, S. auster sp. nov.; B, S. cavigena Kasparyan; C, L, S. coeloclypeus sp. nov.; D, S. ezoensis sp. nov.; E, S. japonicus sp. nov.; F, M, S. kunashiricus Kasparyan; G, S. mandibularis Kasparyan; H, S. michinokuensis sp. nov.; I, S. montanus sp. nov.; J, S. orientalis Kasparyan.

FIGURE 3. A-J, Heads and mandibles of Stilbops. — Head, lateral view (A – J): A, S. auster sp. nov.; B, S. cavigena Kasparyan; C, S. coeloclypeus sp. nov.; D, S. ezoensis sp. nov.; E, S. japonicus sp. nov.; F, S. kunashiricus Kasparyan; G, S. mandibularis Kasparyan; H, S. michinokuensis sp. nov.; I, S. montanus sp. nov.; J, S. orientalis Kasparyan; outer aspect of mandible (K-M): K, S. coeloclypeus sp. nov.; L, S. kunashiricus Kasparyan; M, S. mandibularis Kasparyan.

FIGURE 4. Heads of Stilbops, posterior view. — A, S. auster sp. nov.; B, S. cavigena Kasparyan; C, S. coeloclypeus sp. nov.; D, S. ezoensis sp. nov.; E, S. japonicus sp. nov.; F, S. kunashiricus Kasparyan; G, S. mandibularis Kasparyan; H, S. michinokuensis sp. nov.; I, S. montanus sp. nov.; J, S. orientalis Kasparyan. Scale: 1.0 mm.

FIGURE 5. Pronota and metapleura of Stilbops, lateral view. — Pronotum (A – J): A, S. auster sp. nov.; B, S. cavigena Kasparyan; C, S. coeloclypeus sp. nov.; D, S. ezoensis sp. nov.; E, S. japonicus sp. nov.; F, S. kunashiricus Kasparyan; G, S. mandibularis Kasparyan; H, S. michinokuensis sp. nov.; I, S. montanus sp. nov.; J, S. orientalis Kasparyan; metapleura (K-M): K, S. kunashiricus Kasparyan; L, S. mandibularis Kasparyan; M, S. montanus sp. nov. Scale: 1.0 mm.

FIGURE 6. Mesosomata of Stilbops, dorsal view. — A, S. auster sp. nov.; B, S. cavigena Kasparyan; C, S. coeloclypeus sp. nov.; D, S. ezoensis sp. nov.; E, S. japonicus sp. nov.; F, S. kunashiricus Kasparyan; G, S. mandibularis Kasparyan; H, S. michinokuensis sp. nov.; I, S. montanus sp. nov.; J, S. orientalis Kasparyan. Scale: 0.2 mm.

FIGURE 8. Dorsal surfaces of propodea of Stilbops. — A, S. auster sp. nov.; B, S. cavigena Kasparyan; C, S. coeloclypeus sp. nov.; D, S. ezoensis sp. nov.; E, S. japonicus sp. nov.; F, S. kunashiricus Kasparyan; G, S. mandibularis Kasparyan; H, S. michinokuensis sp. nov.; I, S. montanus sp. nov.; J, S. orientalis Kasparyan. Scale: 1.0 mm. Area superomedia (ASMD); area dentipara (ADP); area postero (AP); lateral part of anterior transverse carina (LATC); lateromedian longitudinal carina (LMLC).

FIGURE 9. Mesosomata of Stilbops, dorsal view. — A, S. auster sp. nov.; B, S. cavigena Kasparyan; C, S. coeloclypeus sp. nov.; D, S. ezoensis sp. nov.; E, S. japonicus sp. nov.; F, G, S. kunashiricus Kasparyan (F, Hokkaido; G, Shikoku); H, S. mandibularis Kasparyan; I, S. michinokuensis sp. nov.; J, S. montanus sp. nov.; K. orientalis Kasparyan. Scale: 0.2 mm.

FIGURE 10. TI of Stilbops, dorsal view. — A, S. auster sp. nov.; B, S. cavigena Kasparyan; C, S. coeloclypeus sp. nov.; D, S. ezoensis sp. nov.; E, S. japonicus sp. nov.; F, S. kunashiricus Kasparyan; G, S. mandibularis Kasparyan; H, S. michinokuensis sp. nov.; I, S. montanus sp. nov.; J, S. orientalis Kasparyan. Scale: 0.2 mm. Blue line: median dorsal carina.

FIGURE 11. Terminalia. — A, B, S. cavigena Kasparyan, male genitalia, ventral view (A), male subgenital plate, ventral view (B); C, D, S. coeloclypeus sp. nov., male genitalia, ventral view (C), male subgenital plate, ventral view (D); E, F, S. ezoensis sp. nov., male genitalia, ventral view (E), male subgenital plate, ventral view (F); G, H, K, S. kunashiricus Kasparyan, male genitalia, ventral view (G), male subgenital plate, ventral view (H), ovipositor, lateral view (K); I, J, L, S. montanus sp. nov., male genitalia, ventral view (I), male subgenital plate, ventral view (J), ovipositor, lateral view (L).

FIGURE 12. Lateral habitus of Stilbops. — A, S. auster sp. nov., female; B, C, S. cavigena Kasparyan (B, female; C, male); D, E, S. coeloclypeus sp. nov. (D, female; E, male); F, G, S. ezoensis sp. nov. (F, female; G, male); H, S. japonicus sp. nov., female; I, J, S. kunashiricus sp. nov. (I, female; J, male); K, S. mandibularis Kasparyan, female; L, S. michinokuensis sp. nov., female; M, N, S. montanus sp. nov. (M, female; N, male); O. orientalis Kasparyan, female. Scale: 1.0 mm.

FIGURE 13. Distribution of Stilbops in Japan.

FIGURE 14. Habitats of Stilbops. — A, S. kunashiricus Kasparyan (Uenae, Hokkaido Pref.); B, S. coeloclypeus sp. nov., S. japonicus sp. nov. and S. mandibularis Kasparyan (Mt. Koubouyama, Kanagawa Pref.); C, S. montanus sp. nov. (Japan Arps, Nagano Pref.), the bamboo grasses are Sasa sp.; D, S. auster sp. nov. (Kedoku, Tokunoshima Is., Ryukyus).