Schenkia japonica, Watanabe, 2025

Schenkia japonica sp. nov.

[New SJN: Hidahige-futo-togari-himebachi]

( Figs. 58A–G, 79X)

Type series. Holotype: JAPAN, KPM-NK 84970 , F, Honshu, Nagano Pref., Outaki Vil., Mt. Ontake-san, Tanohara , 17. VI. 2007, K. Watanabe leg. Paratype: JAPAN: [Honshu] KPM-NK 102785 , F, Fukushima Pref., Hinoemata Vil. , 1–14. VIII. 2004, H. Makihara leg. (MsT) ; KPM-NK 102786 , F, Yamanashi Pref., Hokuto City, Masutomi, Biwakubo-sawa , 28. VII. 2007, K. Watanabe leg. ; KPM-NK 102788 , F, Toyama Pref., Toyama City, Arimine, Jurodani , 21–28. VII. 2009, M. Watanabe leg. (MsT) ; KPM-NK 102784 , F, ditto, 4–11. VIII. 2009 ; OMNH, 1F, ditto, 1–8. IX. 2009 ; KPM-NK 102787 , F, Fukui Pref., Ikeda Town, Mt. Kanakusayama , 9. VI. 1981, T. Murota leg. ; KPM-NK 102789 , F, Fukui Pref., Ikeda Town, Mt. Heko-san , 16. VI. 1981, T. Murota leg.

Description. Female (n = 8). Body punctate and polished; covered with setae; body length 5.6–6.9 (HT: 6.6) mm.

Head 0.6–0.65 (HT: 0.65) × as long as wide in dorsal view. Clypeus 2.2–2.25 (HT: 2.25) × as wide as long; slightly convex in lateral view; sparsely punctate and coriaceous dorsally, smooth ventrally; lower margin truncate in frontal view, sharp in lateral view. Face 0.4–0.45 (HT: 0.45) × as long as minimum width; weakly convex medially; matt; sparsely punctate medially. Frons coriaceous; weakly concave above antennal sockets; punctate dorsally. POL 0.8–1.05 (HT: 1.05) × as OD. OOL 1.2–1.25 (HT: 1.2) × as OD. Gena and occiput finely and densely punctate. Dorsal profile of gena nearly straight in dorsal view; width gradually narrowing posteriorly ( Fig. 58D). Occipital carina complete. Malar space 1.1–1.2 (HT: 1.2) × as long as basal width of mandible. Mandible flat at base; lower tooth equal in length of upper tooth. Antenna with 24–26 (HT: 26) flagellomeres; apical part flattened below and tapped to slender apex. FL I 2.0–2.25 (HT: 2.25) × as long as maximum depth in lateral view, 0.9–0.95 (HT: 0.9) × as long as FL II.

Mesosoma. Pronotum rugulose ventrally ( Fig. 58E). Epomia absent. Mesoscutum with short and weak notaulus ( Fig. 58D). Scutellum sparsely punctate; weakly convex in lateral view. Mesopleuron with or without small conspicuous smooth area around speculum ( Fig. 58E). Epicnemial carina present laterally and ventrally. Sternaulus deep in anterior 0.5 of mesopleuron. Metapleuron with juxtacoxal carina but partly obscured with rugae. Propodeum smooth with punctures, foveolae, and rugae ( Fig. 58G); area externa finely and sparsely punctate; anterior transverse carina absent or slightly present as trace-like; posterior transverse carina complete, inverted U-shaped; lateromedian longitudinal carina complete; lateral longitudinal carina complete; pleural carina complete; area superomedia distinct except for anterior margin, distinctly longer than wide, sometimes longitudinally striate; apophysis absent; spiracle round. Fore wing length 5.4–5.8 (HT: 5.75) mm. Areolet as long as maximum width; width gradually narrowing anteriorly; received vein 2m-cu at near middle ( Fig. 58F). Fore wing vein 1cu-a interstitial to vein M&RS ( Fig. 58F). Nervellus subvertical; intercepted near posterior end of vein. Hind femur reticulate coriaceous; 4.3–4.7 (HT: 4.4) × as long as maximum depth in lateral view. Tarsal claws simple.

Metasoma finely and sparsely punctate, ISP smooth. T I 2.05–2.4 (HT: 2.4) × as long as maximum width; lateromedian carina absent; dorso-lateral carina complete. T II 0.85 × as long as maximum width. Thyridium present; close to anterior margin of T II; slightly depressed; ca. 2.0 × as wide as length. Ovipositor sheath 0.8–0.85 (HT: 0.83) × as long as hind tibia, 1.25–1.4 (HT: 1.25) × as long as T I. Ovipositor straight; apex obtuse; apex of lower valve with teeth ( Fig. 79X).

Colouration ( Figs. 58A–G). Body (excluding wings) black to blackish-brown. Setae silver. Subapical part of mandible, lower part of clypeus, and ventral surface of apical part of flagellum tinged with reddish-brown to brown. FL VII (or VI) to FL X (or XI) with white markings. Fore and mid coxae, all trochanters and trochantelli, mid and hind tibial spurs yellow to ivory. Fore and mid legs except for coxae, trochanters, trochantelli, and mid tibial spurs reddish-brown to brown. Subbasal part of hind tibia largely yellowish-brown. Hind tarsus partly tinged with yellowish-brown. Posterior margins of T II to T IV tinged with reddish-brown. Median part of collar sometimes narrowly tinged with ivory. Median part of face, scutellum, and apex of T I sometimes tinged with reddish-brown. Thyridium and ovipositor reddish-brown. Membranous part of metasomal sternites yellow to yellowish-brown. Apex of metasoma with ivory area. Wings hyaline. Veins and pterostigma brown except for yellowish-brown wing base.

Male. Unknown.

Bionomics. Unknown.

Etymology. The specific name is from Japan.

Distribution. Japan (Honshu).

Remarks. This species resembles S. minuta sp. nov. in the body colouration but can be distinguished by the obtusely pointed apex of ovipositor (sharply pointed apex in S. minuta ), the long malar space and hind femur, and the fewer number of flagellar segments (see above key).