Torbda sauteri Uchida, 1932

Kyohei Watanabe, 2019, Taxonomic and Zoogeographical Notes of Japanese Cryptinae (Hymenoptera, Ichneumonidae), with Description of Five New Species, Bulletin of the Kanagawa Prefectural Museum (Natural Science) 48, pp. 81-113 : 104-106

Torbda sauteri Uchida, 1932

( Figs. 3I , 11A–M )

Torbda sauteri Uchida, 1932b: 191 .

Torbda parallela Momoi, 1970: 365 . Syn. nov.

Description. The original description and redescription of this species ( Uchida, 1932b; Gupta & Gupta, 1983) lacks some important character states. Thus, I redescribe the female of this species below.

Female (n=28). Body length 12.5–23.0 mm, covered with silver setae.

Head 0.6–0.65 times as long as wide. Clypeus 0.45–0.5 times as long as wide, weakly convex, the apex of convexity partly ridge-like, punctate except for smooth anterior margin, anterior margin with a minute and obtuse median tooth. Face 0.55–0.6 times as long as wide. Frons slightly concave, covered with punctures and rugae dorsally, smooth ventrally. Occipital carina complete, its lower end joined with hypostomal carina. MSL 0.7–0.8 times as long as BWM. OOL 1.5–1.8 times as long as OD. POL 0.9–1.2 times as long as OD. Antenna with 25–26 flagellomeres. F1 0.95 times as long as F2.

Mesosoma polished. Epomia present. Lateral area of pronotum largely smooth, punctate along dorsal and posterior margins. Notauli distinct on anterior half of mesoscutum. Mesoscutum punctate. Scutellum weakly convex, punctate. Epicnemial carina distinct, its dorsal end not joined with anterior margin of mesopleuron and subalar prominence. Mesopleuron sparsely punctate, with some irregular rugae dorsally. Metapleuron punctate. Pleural carina of propodeum present, partly united with rugae. Anterior transverse carina of propodeum complete. Posterior transverse cairna present, partly united with transverse striae. Propodeum covered with irregular and transverse rugae except for area anterior to anterior transverse carina punctate. Propodeal apophysis absent. Propodeal spiracle elongate. Fore wing length 10.5–17.0 mm. Areolet large, hexagonal, with almost parallel sides ( Figs. 11H–J ). Nervulus based on basal vein ( Figs. 11H–J ). Nervellus intercepted anterior to midpoint. Fore tibia with a bulge except for basal 0.25. Hind femur 5.2–5.7 times as long as maximum depth in lateral view. Hind TS2: TS1, TS3, TS4 and TS5 = 2.0: 4.6–5.0, 0.9–1.0, 0.5–0.7 and 1.3–1.6.

Metasoma polish and punctate. T1 1.85–2.0 times as long as maximum width, sparsely punctate posteriorly, smooth anteriorly, with a pair of small obtuse (not triangular) teeth at base. Median dorsal carina of T1 present, indistinct posteriorly. Dorsolateral carina of T1 complete. T2 0.75–0.85 times as long as maximum width, with a basal median triangular convexity ( Fig. 11M ). T3– T5 usually with a weak, transverse convexity ( Fig. 11M ). Ovipositor sheath 1.25–1.4 times as long as hind tibia. Apex of ovipositor as Fig. 3I .

Coloration ( Figs. 11A–M ). Body (excluding wings and legs) black, except for: clypeus except for dorsal and ventral (sometimes also lateral) margins, palpi, face except for median longitudinal short black stripe, all orbits, gena, malar space, ventral spot of scape, median spot and a pair of posterior spots (sometimes absent) of collar, dorsal margin of pronotum, posterior spot of propleuron, a median spot and a pair of posterior spots of mesoscutum, scutellum, postscutellum (sometimes in part), tegula, subalar prominence, speculum, a large spot of mesopleuron, a longitudinal stripe along sternaulus (sometimes absent), two spots of metapleuron, an anterior transverse band and a posterior spot of propodeum, posterior band of T1–T7 and lateral side of T7 and T8 whitish yellow to yellow; F6–F10 (sometimes also F5, F11 and F12) with a white band; mandible more or less tinged with reddish brown; ovipositor reddish brown. Occiput sometimes with a pair of yellow spots. Whitish yellow to yellow band of T7 sometimes with enlarged area dorsolaterally. Wings hyaline, slightly tinged with yellow, sometimes with clouded area on apex of fore wing, small area along 3rd section of discoideus and small area along base of nervulus; veins and pterostigma blackish brown to brown except for yellow wing base. Legs reddish brown, except for: fore and mid coxae and trochanters whitish yellow to yellow; fore and mid TS5 partly tinged with brown; fore and mid coxae black at base and apex; hind coxa black with whitish yellow to yellow markings dorsally; apex of hind tibia and TS5 tinged with brown to blackish brown; base of hind tibia sometimes blackish brown tinged with brown to blackish brown; hind TS1–4 whitish yellow to reddish brown except for darkened apex. Trochanters sometimes tinged with blackish brown.

Male. No additional specimen available in this study.

Specimens examined. JAPAN: KPM-NK 69504, 69505, 2 F, Kagoshima Pref., Amamioshima Is., Mt. Yuidake, 15. VII. 2004, H. Makihara leg. (MsT); KPM-NK 69506 , 69507 , 2 F, ditto, 27. VII. 2004 ; KPM-NK 69508 , 69509 , 2 F, ditto, 10. VIII. 2004 ; KPM-NK 69510–69512 , 3 F, ditto, 14. X. 2004 ; KPM-NK 69513 , F, Kagoshima Pref., Amamioshima Is., Yamato Vil., Oodana , 2–9. VI. 2007, K. Watanabe leg. (MsT) ; KPM-NK 69514 , F, Okinawa Pref., Okinawajima Is., Nago City , 29. VIII. 2001, H. Irei & H. Makihara leg. (MsT) ; KPM-NK 69515 , F, ditto, 16. IV. 2002 ; KPM-NK 69616 , 69517 , 2 F, ditto, 13. V. 2002 ; KPM-NK 69518 , F, ditto, 23. IX. 2002 ; KPM-NK 69519 , F, ditto, 21. X. 2002 ; KPM-NK 69120 , F, ditto, 26. V. 2003 ; KPM-NK 69521 , F, ditto, 7. VII. 2003 ; KPM-NK 69522 , F, ditto, 12–16. IX. 2004 ; KPM-NK 69523 , F, Okinawa Pref., Okinawajima Is., Nago City, Sedake , 25. VI. 2013, S. Yoshizawa leg. ; KPM-NK 69524 , F, Okinawa Pref., Okinawajima Is., Kunigami Vil., Uka , 30. IV. 2001, H. Irei & H. Makihara leg. (MsT) ; KPM-NK 69525–69527 , 3 F, Okinawa Pref., Okinawajima Is., Kunigami Vil., Ginama , 23. IV. 2002, H. Irei & H. Makihara leg. (MsT) ; KPM-NK 69528 , F, Okinawa Pref., Okinawajima Is., Kunigami Vil., Oku , 16. VIII. 2001, H. Irei & H. Makihara leg. (MsT) ; MNHAH, F (holotype of T. parallela ), Okinawa Pref., Ishigakijima Is., Karayama , 14– 18. III. 1964 , C. M. Yoshimoto & J. Harrell (MsT); KPM-NK 69501 , F, Okinawa Pref., Iriomotejima Is., Riverside of Urauchigawa , 13. V. 2008, K. Watanabe leg. ; KPM-NK 69502 , F, Okinawa Pref., Ishigakijima Is., Mt. Omotodake , 14. V. 2008, T. Mita leg. ; KPM-NK 69503 , F, ditto, 15. V. 2008, S. Yoshizawa leg. CHINA: GSFPM, F (det. Sheng), Fujian Prov., Shangyan , 10. V. 2011 .

Distribution. Japan (Amamioshima Is.*, Okinawajima Is., Ishigakijima Is. and Iriomotejima Is.*): China and Taiwan

Remarks. This is the first record of this species from Amamioshima Island and Iriomotejima Island.

Genus Xoridesopus Cameron, 1907 Xoridesopus Cameron, 1907c: 18 . Type species: X o r i d e s o p u s a n n u l i c o r n i s Cameron, 1907. Monobasic.

In Japan, three species, X. infuscatus Gupta & Gupta, 1983 , X. nigrispeculum Momoi, 1970 , and X. taihokensis (Uchida, 1932) , have been recorded. In this study, I describe two new species from Ryukyus below. I could not the voucher specimen of X. taihokensis recorded from Japan by Uchida (1956) and Momoi (1970). By the result of my field and institution investigations, the distribution of Xoridesopus species in Japan shows allopatric pattern, i.e., X. tokarensis sp. nov. from Tokara Isls. (Nakanoshima Is.), X. amamiensis sp. nov. from Amami Isls. (Amamioshima Is. and Tokunoshima Is.), X. infuscatus from Okinawajima Is. and X. nigrispeculum from Yaeyama Isls. (Ishigakijima Is. and Iriomotejima Is.).

Momoi (1970) recorded X. taihokensis from Amami Isls. and Okinawajima Is. and these records may be based on misidentification of X. amamiensis and X. infuscatus . Thus, further studies of X. taihokuensis are necessary. Japanese species of Xoridesopus can be distinguished by the following key.

Key to Japanese species of the genus Xoridesopus

(Male of X. tokarensis sp. nov. unknown)

1. Nervellus intercepted at or anterior to the middle. Hind coxa largely reddish brown (sometimes with a black ma rking).................................................................................................................. X. taihokuensis (Uchida, 1932)

-. Nervellus intercepted posterior to the middle ( Fig. 12E ). Hind coxa black, usually with a large dorsal yellow or white marking ( Figs. 12A, B, D , 13A, B, D )................................................................................................................2

2. Speculum without a yellow marking. Female with an entirely yellow face................. X. nigrispeculum Momoi, 1970

-. Speculum with a yellow marking ( Figs. 12A, D, F , 13A, D, E, G, J ). Face of female entirely yellow ( Fig. 13C ) or yellow with a pair of longitudinal black stripes ( Figs. 12C , 13I )..................................................................................3

3. Females........................................................................................................................................................................4

-. Males............................................................................................................................................................................6

4. Face entirely yellow ( Fig. 13C ). Mesosternum with a conspicuous yellow marking ( Figs. 13A, D )............................ ................................................................................................................................. X. infuscatus Gupta & Gupta, 1983

-. Face yellow with a pair of longitudinal black stripes ( Figs. 12C , 13I ). Mesosternum black ( Figs. 12A, D , 13G, J )............................................................................................................................................................5

5. Yellow marking on speculum, lower hind corner of mesopleuron, metapleuron, hind coxa and T7 large ( Figs. 12A, D ). Lateral part of posterior transverse carina of propodeum clearly defined ( Fig. 2C ). Scutellum entirely yel low............................................................................................................................................ X. amamiensis sp. nov.

-. Yellow marking on speculum, lower hind corner of mesopleuron, metapleuron, hind coxa and T7 small ( Figs. 13G, J ). Lateral part of posterior transverse carina of propodeum indistinct. Scutellum yellow except for black posterior margin ( Fig. 13K ).................................................................................................................. X. tokarensis sp. nov.

6. Hind tarsus entirely blackish brown ( Fig. 12F ). Sternaulus at least partly tinged with black ( Fig. 12F )..................... .................................................................................................................................................. X. amamiensis sp. nov.

-. Hind tarsus with a conspicuous yellow or white area ( Fig. 13E ). Sternaulus without black pigmentation ( Fig. 13E ).. ............................................................................................................................... X. infuscatus Gupta & Gupta, 1983

Figures

Fig. 3. Giraudia japonica sp. nov. (A, B, KPM-NK 69946), Apsilops scotinus (Tosquinet, 1903) (C, KPM-NK 69932), Dihelus hylaevorus (Momoi, 1966) (D, paratype, MNHAH), Eurycryptus sakaguchii (Uchida, 1932) (E, NIAES), Hedycryptus ohshimensis (Uchida, 1930) (F, NIAES), Ischnus splendens sp. nov. (G, KPM-NK 69406), Nematopodius (Nematopodius) montanus sp. nov. (H, KPM-NK 69554),Torbda sauteri Uchida, 1932 (I, KPM-NK 69501),Xoridesopus amamiensis sp. nov. (J, KPM-NK 69529) andX. tokarensis sp. nov. (K, KPM-NK 69548), female ― A–K, apex of ovipositor, lateral view.

Fig. 11. Torbda sauteri Uchida, 1932, KPM-NK 69501 (A, C, D, K, M, N), 69502 (E, I), 69508 (H), 69516 (F), 69518 (J), 69521 (P), 69523 (B), 69527 (O) and 69528 (L, P), females ― A, B, habitus, lateral view; C, head, mesosoma and metasoma, dorsal view; D, head, frontal view; E–G, occiput, posterodorsal view; H–J, apical part of right fore wing; K, L, hind tibia, lateral view; M, T2 and T3, dorsal view; N–P,T7, dorsolateral view.

Fig. 12. Xoridesopus amamiensis sp. nov., KPM-NK 69529 (A–E) and 69545 (F–H), female (A–E) and male (F–H) ― A, F, habitus, lateral view; B, G, head, mesosoma and metasoma, dorsolateral view; C, H, head, frontal view; D, head and mesosoma, lateral view; E, nervellus of hind wing.

Fig. 13. Xoridesopus infuscatus Gupta & Gupta, 1983 (A–F) and X. tokarensis sp. nov. (G–K), KPM-NK 5006283 (A–D), 5006289 (E, F) and 69548 (G–K), females (A–D, G–K) and male (E, F) ― A, F, habitus, lateral view; B, G, head, mesosoma and metasoma, dorsolateral view; C, H, head, frontal view; D, head and mesosoma, lateral view; E, nervellus of hind wing.

Fig. 2. Eurycryptus sakaguchii (Uchida, 1932) (A, D, NIAES), Pterocryptus takachihoensis (Momoi, 1966) (B, G, KPM-NK 5000304), Xoridesopus amamiensis sp. nov. (C, KPM-NK 69529; H, KPM-NK 69531), Hedycryptus ohshimensis (Uchida, 1930) (E, L, M, NIAES), Ischnus splendens sp. nov. (F, KPM-NK 69415), Cryptus dianae (Gravenhorst, 1829) (I–K, KPM- NK 69930) and Dihelus hylaevorus (Momoi, 1966) (N, paratype, MNHAH), female ― A–C, propodeum, lateral view; D, propodeum,T1, T2 and T3, dorsal view, punctures on right side and T3 omitted; E–H, T1, dorsal view; I, K, L, T1, lateral (I, L) and ventrolateral (K) view; J, M, cross-section of anterior part of T1, arrows indicate the carinae; N, apex of metasoma, lateral view. ATC, anterior transverse carina; PTC, posterior transverse carina; PC, pleural carina; TT, triangular tooth; DLC, dorsolateral carina; VLC, ventrolateral carina.