Euryproctus japonicus ( Ashmead, 1906 )

Watanabe, Kyohei, 2024, Taxonomic Study of Japanese Ctenopelmatinae (Hymenoptera, Ichneumonidae), with Descriptions of 22 New Species, Bulletin of the Kanagawa Prefectural Museum (Natural Science) 53, pp. 39-102 : 54-56

Euryproctus japonicus ( Ashmead, 1906) (SJN: Ezo-maru-himebachi)

( Figs. 10A–G , 41 A )

Sychnoleter japonicus Ashmead, 1906: 182 .

Description. Female (n = 1). Body length 6.3 mm, matt and covered with silver setae.

Head 0.6 × as long as wide in dorsal view. Clypeus 3.0 × as broad as high, polished and sparsely punctate ventrally, lower margin rounded, thick in lateral view. Face 1.8 × as broad as high, flat. Occipital carina complete. Length of malar space 0.9 × as long as basal width of mandible. Base of mandible with a conspicuous convexity ( Fig. 41A ). POL 1.0 × as long as OD. OOL 1.55 × as long as OD. Antenna with 42 flagellomeres. FL I 5.7 × as long as maximum depth, 1.55 × as long as FL II.

Mesosoma. Epomia absent. Mesoscutum with weak notaulus. Epicnemial carina present laterally and ventrally. Speculum with a small smooth area ( Fig. 10C ). Mesopleuron with fine oblique rugae below subtegular ridge ( Fig. 10C ). Propodeum with all carinae except for anterior transverse carina ( Fig. 10D ). Lateral longitudinal carina obscured anteriorly. Fore wing length 6.2 mm. Areolet present but vein 3rs-m largely indistinct, not petiolated, received vein 2m-cu near the middle ( Fig. 10E ). Fore wing vein 1cu-a interstitial to vein M&RS. Nervellus subvertical, intercepted slightly anterior the middle. Tarsal claws pectinate. Hind femur 5.2 × as long as maximum depth in lateral view. Ratio of length of hind first to fifth tarsomeres 4.5: 2.0: 1.5: 0.9: 1.0.

Metasoma. T I 1.8 × as long as maximum width. T II 0.6 × as long as maximum width. Ovipositor sheath 0.2 × as long as hind tibia.

Colouration ( Figs. 10A–E ). Body (excluding wings and legs) black. Antenna with a white band. Lower part of clypeus, ventral surfaces of scape and pedicel, palpi, postero-dorsal corner of pronotum, and tegula reddish brown. Flagellum except for a white band yellowish brown to dark brown. Posterior margin of T I, T II to T IV, and membranous part of metasomal sternites reddish brown to red. Wings hyaline. Veins and pterostigma brown to yellowish brown except for yellow wing base. Hind tibia yellowish brown basally, blackish brown apically. Legs yellowish brown to blackish brown. Coxae, hind trochanter, and hind femur black. Hind TS II to TS IV white.

Male (n = 2). Similar to female. Body length slightly shorter than female (minimum specimen: 5.7 mm). Clypeus 2.75–3.0 × as broad as high. Length of malar space 0.65–0.7 × as long as basal width of mandible. Fore wing vein 1cu-a interstitial or slightly postfurcal to vein M&RS. Ratio of length of hind first to fifth tarsomeres 4.3–4.5: 2.0: 1.3–1.35: 0.8: 0.9. T I 2.1–2.3 × as long as maximum width. T II 0.85 × as long as maximum width. Face except for a median black stripe, malar space, clypeus, mandible except for teeth, ventral surface of scape, postero-dorsal corner of pronotum, and tegula whitish yellow ( Figs. 10 F, G ). Coxae, trochantellus, and trochantelli except for hind coxa white to whitish yellow ( Fig. 10F ).

Materials examined. JAPAN: KPM-NK 84826–84828 , 1 F & 2 M, Hokkaido, Sapporo City, Mt. Soranuma-dake , 14. VI. – 4. VII. 2007, A. Ueda leg. (MsT) .

Distribution. Japan (Hokkaido).

Bionomics. Unknown.

Remarks. This is the second record of this species and the first record of the male of this species.

Figures

Fig.10.Euryproctus japonicus (Ashmead, 1906) (A–E:KPM-NK 84826, female; F, G: KPM-NK 84828,male) ―A, F:lateral habitus;B, G: head, frontal view; C: mesopleuron and metapleuron; D: propodeum,dorso-lateral view; E: areolet.

Fig. 41. Mandible (A, B), propodeum, dorsal view (C–F), left hind tarsus (G–I), left hind tarsal claw (J), apical part of metasoma, dorsal (K, L) and lateral (M, N) view, and apex of ovipositor, lateral view (O, P), females ―A: Euryproctus japonicus (Ashmead, 1906) (KPM- NK 84826); B, D: Perilissus autumnalis sp. nov. (KPM-NK 91241, holotype); C, J, O: Ctenopelma boreale Holmgren, 1857 (C, O: KPM-NK 84794; J: KPM-NK 84795); E, K, M: Notopygus bicornis sp. nov. (KPM-NK 81355, holotype); F, L, N: N. japonicus sp. nov. (KPM-NK 84831, holotype); G: Hyperbatus ariminensis sp. nov. (KPM-NK 84935, holotype); H: H. nigrifemur sp. nov. (KPM- NK 84958, holotype); I: Lethades kanagawensis sp. nov. (KPM-NK 81378, holotype); P:Ctenopelma pineatus Sheng, Sun & Li, 2019 (KPM-NK 84787).