Theroscopus fukuiyamensis ( Uchida, 1936 )

Watanabe, Kyohei, 2022, Distribution Records and Re-descriptions of Some Japanese Species of the Subfamily Phygadeuontinae (Hymenoptera, Ichneumonidae), Bulletin of the Kanagawa Prefectural Museum (Natural Science) 51, pp. 61-72 : 68-70

Theroscopus fukuiyamensis ( Uchida, 1936) (SJN: Fukuiyama-chibi-togari-himebachi)

( Figs 5A–D )

Hemiteles (Aenoplex) fukuiyamensis Uchida, 1936: 13 .

Description. Female (n=11). Body length 6.1–8.5 mm. Body polished, covered with silver setae.

Head 0.6 times as long as wide in dorsal view. Clypeus 0.45 times as wide as maximum length, sparsely punctate, its anterior margin with a pair of minute median teeth. Face almost flat, dEnsEly punctatE. LEngth of malar spacE 0.85– 0.95 times as long as basal width of mandible. OD: POL: OOL = 0.5: 0.5–0.7: 1.0–1.2. Occipital carina complete, its lower end joined with hypostomal carina distant from mandibular base. Upper tooth of mandible slightly longer than lowEr tooth. BasE of mandiblE flat. AntEnna with 19– 20 flagEllomErEs, subapical part slightly widEnEd. LEngth of FL I 5.7–6.7 times as maximum depth of FL I in lateral view and 0.83–0.9 times as long as length of FL II.

Mesosoma. Lateral part of pronotum coriaceous and sparsely punctate dorsally, longitudinally striate posteriorly, smooth along sharp epomia. Mesoscutum matt, densely punctate. Notaulus distinct, its posterior end not beyond the cEntrE of mEsoscutum. ScutEllum finEly punctatE, without a lateral longitudinal carina except for base. Mesopleuron covered with fine and dense punctures, with fine longitudinal striae ventrally, without a conspicuous smooth area. Epicnemial carina present laterally, its dorsal end not reaching anterior margin of mesopleuron. Sternaulus present except for posterior 0.35. Posterior transverse carina of mesosternum largely absent in front of middle coxa. Metapleuron punctate, with a complete juxtacoxal carina. Propodeal carinae and areas complete or sometimes lateromedian longitudinal carina and lateral longitudinal carina partly obtusE ( Fig. 5D ). PropodEum finEly punctatE except for area superomedia, area dentipara except lateral part, and area postero smooth. Postero-lateral corner of area densipara not projected. Area basalis narrower than area superomedia. Area superomedia longer than wide, receiving lateral section of anterior transverse carina just in front of middle ( Fig. 5D ). Length of fore wing 5.0– 6.6 mm. Areolet absent. Vein 1cu-a interstitial to vein M&RS. Nervellus subvertical, intercepted posterior 0.75. Hind femur 4.95–5.2 times as long as maximum depth in lateral view. Hind TS I: II: III: IV: V = 2.0: 0.9: 0.6: 0.2–0.3: 0.4–0.5. Tarsal claws simple.

Metasoma. T I 2.0–2.6 times as long as maximum width, largely coriaceous. Median dorsal carina of T I present except for posterior part. Dorsolateral carina of T I complete. T II 0.7–0.85 times as long as maximum width. T II to T VII covered with minute punctures. Ovipositor sheath 0.85–0.95 times as long as hind tibia. Ovipositor straight, with a weak nodus and ventral teeth.

Coloration ( Figs. 5A–D ). Body (excluding wings and legs) black to blackish brown. FL IV to FL VII (sometimes also base of FL VIII) and posterior part of T VII white. Posterior margins of T II and T III tinged with reddish brown. Ovipositor reddish brown. Wings hyaline, slightly darkened behind of pterostigma. Veins and pterostigma brown to blackish brown except for base of pterostigma whitish brown. Wing base whitish yellow. Fore and mid legs reddish brown (coxae and femora more or less darkened. Hind leg black to blackish brown. Hind trochanter, trochantellus, base of femur, and subbasal part of tibia tinged with reddish brown.

Male. Unknown.

Materials examined. JAPAN: KPM-NK 81809, F, Kanagawa Pref., Yokosuka City, Mt. Oogusu-yama , 7. V. 2014, K. Watanabe leg. ; KPM-NK 81810, F, Kanagawa Pref., Hadano City, Mt. Koubou-yama , 29. IV. 2007, K. Watanabe leg. ; KPM-NK 81811, 81812, F, ditto, 1. V. 2016, K. Watanabe & H. Utsugi leg. ; KPM-NK 81803, F, Nagano Pref., Ueda City, Sugadairakogen, Tsukuba University , 3–26. IX. 2014, S. Shimizu leg. (MsT) ; KPM-NK 81807, 81808, 2 F, Toyama Pref., Nanto City, Togamura-kamimomose , 21–28. VII. 2009 , M. Watanabe et al. leg. (MsT); KPM-NK 81805, 81806, 2 F, ditto, 25. VIII. 2009, 1. IX. 2009 ; KPM-NK 81804, F, ditto, 15–29. IX. 2009; SEHU , F (holotype), Kochi Pref., Kochi City, Fukuiyama , 18. V. 1931, Y. Sugihara leg.

Distribution. Japan (Honshu and Shikoku).

Bionomics. Unknown.

Remarks. KPM-NK 81812 has been compared with the holotype deposited in SEHU. The above additional specimens differ from the holotype in the body length (6.1–8.5 mm in the additional specimens, “ 10 mm ” in holotype) ( Uchida, 1936), while I judged that this character statE is an intraspEcific variation.

Figures

Fig. 5. Theroscopus fukuiyamensis (Uchida, 1936), female, KPM-NK 81812. A: lateral habitus; B: dorsal habitus; C: head, frontal view; D: scutellum and propodeum, dorsal view.