Maaserphus yamagishii Abe sp. nov. (Figs 20–24)

Diagnosis. Length of face 0.98–1.13 times as long as middle inner distance of compound eyes (Fig. 21). Pronotal groove widened posteriorly (Fig. 22); pronotal corner with one pit. Metapleural carina weak and incomplete (Fig. 23); longitudinal median groove on propodeal smooth area weakly punctate, posterior margin with pair of short longitudinal carinae; posterior part of propodeum areolate; ovipositor sheath curved apically (Fig. 24), 0.78–0.85 times as long as of hind tibia, 6.25–7.28 times as long as its maximum width.

Description. Female. Body 3.2–3.7 mm (Fig. 20). Color. Antenna, body, and coxae yellow-brown; apical part of mandible black; legs except for coxae yellow.

Antenna. Length to width of F9–F11 as follows: 1.5–1.73: 1; 1.39–1.48: 1; 2.37–2.41: 1.

Head. Length of face 0.98–1.13 times as long as middle inner distance of compound eyes (Fig. 21); upper part of gena 0.54–0.57 times as wide of compound eye laterally; compound eye with hairs, 2–2.6 times as long as diameter of ommatidium; POL: OOL = 1.44–1.47; clypeus sparsely punctate, ventral margin developed, with carina, 0.58 times as long as inner distance of compound eyes; smooth area between antennal sockets with small projection; diameter of antennal socket 0.15–0.19 times as long as inner distance of compound eyes; mandible almost straight, without inner teeth; labrum with hairs.

Mesosoma. Ventral part of propleuron smooth, with hairs; pronotal neck with some wrinkles; area between pronotal shoulders weakly rugose; dorsal part of pronotal shoulder smooth, weakly projecting laterally; lateral margin of pronotal shoulder developed, with some depressions; dorso-lateral margin of pronotum with hairs, carina on antero-dorsal part of lateral pronotal area short and weak; anterior part of scrobe weakly wrinkled; anterior margin of pronotal groove projecting; pronotal groove with fine wrinkles (Fig. 22); epomia separated from pronotal shoulder.Mesopleuron with hairs dorsally and ventrally, postero-dorsal corner with some weak wrinkles; mesopleural hair band incomplete; horizontal groove weakly curved, anterior margin with a pit, posterior margin not extended to ventro-posterior corner (Fig. 22); mesopleural suture foveolate completely; mesodiscrimen foveolate posteriorly, anterior margin with a deep pit. Mesoscutum covered with hairs; notaular ridge antero-lateral to notaulus present; notaulus short, 0.76–1.03 times as long as length of tegula; prescutellar groove (scutellar fovea) smooth; scutellum with hairs sparsely, 1.3–1.37 times as long as its width; posterior margin of scutellum foveolate; postscutellum with two carinae. Metapleural carina weak and incomplete; groove on metapleural smooth area incomplete; epicoxial carina present (Fig. 23). Longitudinal median groove on propodeal smooth area developed, weakly punctate; posterior margin of propodeal smooth area with a pair of short longitudinal carinae; posterior part of propodeum areolate, longitudinal and transverse carina absent; propodeal spiracle opening oval, 2.33–2.65 times as long as of width.

Wing. Fore wing 2.1–2.3 mm. Costal part of radial cell (R1) 0.73–0.94 times as wide as of stigma; intercubius (Rs+M) indistinct.

Leg. Middle tibia with two spurs apically, longer spur 1.0–1.2 times as long as shorter one; hind tibia with two spurs apically, longer spur 1.1–1.4 times as long as shorter one.

Metasoma. Base of syntergite developed, with very short multiple grooves; longitudinal median groove on antero-dorsal part of syntergite short, 0.41 times as long as antero-dorsal margin of sytergite; ovipositor sheath curved apically, with three punctate lines, 0.78–0.85 times as long as of hind tibia, 6.25–7.28 times as long as its maximum width (Fig. 24).

Male. Unknown.

Specimen examined. Holotype. Female, “ JAPAN: Aichi (900 m), Shitara, Uradani (Beech forest), 4–10 VII 1994, K. Yamagishi, MT” (ELMU).

Paratype. Japan: [Honshu] Gunma Pref., 1♀, Katashina, 8 VIII 1956, A. Habu (NARO) .

Host. Unknown.

Distribution. Palaearctic region: Japan.

Etymology. The specific epithet is in honor of Dr. Kenzo Yamagishi who collected the holotype of this new species.