Javra tenuis, Watanabe, 2025

Javra tenuis sp. nov.

[New SJN: Hosomi-kuro-togari-himebachi]

( Figs. 36A–H, 79G)

Javra sp. C : Watanabe & Taniwaki, 2018: 80.

Type series. Holotype: JAPAN, KPM-NK 102799 , F, Honshu, Tokyo, Hachioji City, Uratakaomachi , Kogesawa , 12. IX. 2020, Y. Kato leg. Paratype: JAPAN, [Honshu] KPM-NK 102802 , F, Saitama Pref., Yorii Town, Gonotsubo , 6. X. 2000, T. Nambu leg. ; KPM-NK 102800 , F, Toyama Pref., Nanto City, Togamura-kamimomose , 4–11. VIII. 2009, M. Watanabe leg. (MsT) ; KPM-NK 102801 , ditto, 15–29. IX. 2009 ; KPM-NK 102803 , F, Toyama Pref., Toyama City, Arimine, Inone-dani , 15–22. IX. 2009, M. Watanabe leg. (MsT) ; KPM-NK 102804 , F, Toyama Pref., Toyama City, Kamegai , 15–26. IX. 2009, M. Watanabe leg. (MsT).

Description. Female (n = 6). Body polished; covered with setae; body length 8.1–10.4 (HT: 9.1) mm.

Head 0.6 × as long as wide in dorsal view. Clypeus 1.8– 1.95 (HT: 1.8) × as wide as long; weakly convex in lateral view; sparsely punctate; lower margin subtruncate; sharp in lateral view. Face 0.5 × as long as minimum width; matt; slightly convex medially; finely punctate medially. Anterior tentorial pit small. Frons weakly concave above antennal sockets; coriaceous; concavities above antennal sockets smooth. POL 0.9–1.2 (HT: 1.05) × as OD. OOL 1.1–1.35 (HT: 1.2) × as OD. Dorsal profile of gena slightly convex; width abruptly narrowing posteriorly ( Fig. 36D). Occipital carina complete. Malar space 0.8–0.9 (HT: 0.9) × as long as basal width of mandible. Mandible flat at base; lower tooth slightly longer than upper tooth. Antenna with 29–30 (HT: 30) flagellomeres; not flattened and tapped. FL I 4.68–5.1 (HT: 5.1) × as long as maximum depth in lateral view, 1.05–1.15 (HT: 1.15) × as long as FL II.

Mesosoma. Pronotum rugulose ventrally; densely punctate dorsally. Epomia long; dorsal end situated slightly below dorsal margin of pronotum. Mesoscutum densely punctate. Notaulus weak and not sharp; posterior end not reaching centre of mesoscutum ( Fig. 36D). Scutellum densely punctate; weakly convex in lateral view. Mesopleuron obliquely to irregularly rugulose anteriorly, finely and densely punctate posteriorly; without conspicuous smooth area around speculum ( Fig. 36E). Epicnemial carina present laterally and ventrally. Sternaulus deep in entire length of mesopleuron. Metapleuron finely punctate anteriorly; weakly rugulose posteriorly; with complete juxtacoxal carina. Propodeum finely and sparsely punctate anteriorly; rugose or rugulose posteriorly; with all carinae ( Fig. 36G); lateromedian longitudinal carina sometimes partly indistinct between both transverse carinae; area superomedia at least partly defined, longer than maximum width; area dentipara transversely to obliquely rugose; apophysis long; apex somewhat sharp; spiracle oval. Fore wing length 6.8–8.1 (HT: 7.5) mm. Areolet slightly wider than long; width slightly narrowing anteriorly; received vein 2m-cu basal than middle ( Fig. 36F). Fore wing vein 1cu-a interstitial to vein M&RS ( Fig. 36F). Nervellus subvertical; intercepted near posterior end of vein ( Fig. 36F). Hind femur reticulate coriaceous; 5.2–5.8 (HT: 5.7) × as long as maximum depth in lateral view. Tarsal claws simple.

Metasoma matt ( Fig. 36H). T I 2.5–2.65 (HT: 2.63) × as long as maximum width; latero-median carina absent; dorso-lateral carina complete. T II 1.0–1.05 (HT: 1.0) × as long as maximum width. Thyridium present; somewhat distant from (by more than length of thyridium) anterior margin of T II; flat to slightly depressed; ca. 2.0 × as wide as length. Ovipositor sheath 1.25–1.33 (HT: 1.3) × as long as hind tibia, 2.5–2.7 (HT: 2.6) × as long as T I. Ovipositor straight to slightly decurved; apex sharp; apex of lower valve with teeth ( Fig. 79G).

Colouration ( Figs. 36A–H). Body (excluding wings) black to blackish-brown. Setae silver. Subapical part of mandible and posterior margins of metasomal tergites (especially T II) weakly tinged with reddish-brown. Face with median small yellow marking below antennal sockets. FL VII to FL X with white markings. Hind second to fourth tarsomeres ivory. Membranous part of metasomal sternites dark yellowish-brown. Apex of metasoma white. Ovipositor reddish-brown. Wings hyaline. Veins and pterostigma blackish-brown to brown except for yellowish-brown wing base.

Male. Unknown.

Distribution. Japan (Honshu).

Bionomics. Unknown.

Etymology. The specific name is from the Latin “ tenuis ” (slender), referring to the slender species.

Remarks. This species resembles J. gigantea sp. nov. in the large body with white banded hind tibia but can be distinguished by the shape of areolet and the surface of mesoscutum (see above key). This species also resembles J. coreensis and J. taniguchiae in the black body but can be distinguished by the large body size (more than 8.0 mm in this species; less than 8.0 mm in J. coreensis and J. taniguchiae ), ovipositor sheath 1.25–1.33 × as long as hind tibia (0.65–0.8 × in J. coreensis ; 1.43 × in J. taniguchiae ), and the hind tibia without white base (with white base in J. taniguchiae ).