Aethecerus albicoxalis sp. nov.

(Figs 1–4)

Holotype. (♂) [Japan] Kagoshima Pref.: Yakushima Isl., Malaise trap (H3), 250 m alt., 8–28. VI. 2007, T. Yamauchi et al. leg. (Kanagawa).

Paratypes. (3 ♂) same data as holotype (Kanagawa and coll. Riedel) .

Etymology. The species name refers to the completely ivory coxae.

Description. Male. Body length 5.5–6.0 mm.

Head. Flagellum with 24–25 flagellomeres, bristle-shaped; 1 st flagellomere 2.9–3.3× as long as wide. Tyloids on flagellomeres 7–11, long-oval, maximally 0.8× as long as their segments. Temple moderately and roundly narrowed behind eye. OED 1.1× ocellar diameter. Temple, frons and face densely and coarsely punctate, shining. Clypeus moderately convex, with sparse punctures, shining; apical margin blunt, convex. Ventral mandibular tooth much smaller than dorsal tooth, not bent inwards. MI 0.1–0.2. Gena densely punctate, distinctly excavated ventrally; hypostomal carina lamelliform widened.

Mesosoma. Side of pronotum striate ventrally. Notaulus shortly impressed at frontal margin of mesoscutum. Mesoscutum densely punctate, shining. Mesopleuron coarsely punctate, speculum smooth. Metapleuron rugose-punctate. Scutellum slightly convex, wider than long, with rather dense punctures and lateral carina in basal 0.2. Propodeal spiracle round. Area basalis with median tubercle. Area superomedia heart-shaped, slightly wider than long; costula reaching its middle. Area petiolaris long, with transverse rugae. Hind femur 3.5× as long as wide. Areolet pentagonal; frontal distance between veins 2rs-m and 3rs-m 2.0× their width; vein 2m-cu reaching its middle. Vein 1cu-a slightly postfurcal. Nervellus of hind wing reclivous, intercepted at apical 0.7.

Metasoma. Postpetiole slightly widened, almost smooth and shining. Gastrocoelus indistinct.Thyridium slightly oblique, 0.2–0.3× as wide as interval between thyridia. 2 nd tergite 1.4–1.5× as long as wide, granulate and with fine concentrical ridges in basal half.

Color. Black. Flagellum brownish, ochreous or yellowish ventrally. Palps ivory. Mandible centrally, clypeus, face and scape yellowish. Collar and hind edge of pronotum, tegula and subtegular ridge ivory. Tergites brownish, 2 nd to 6 th tergites with narrow ivory apical margins. Legs ochreous; all coxae and trochanters ivory; hind femur brownish; hind tibia blackish, with ± extended subbasal yellowish ring; hind tarsus blackish. Wings almost hyaline, pterostigma brown.

Female unknown.

Distribution. Japan (Yakushima Isl.).

Remark. Uchida (1924) described a Japanese male from Hokkaido as Aethecerus parianae . We have not seen the type material yet, but the new species differs from the original description of Ae. paranae (Uchida, 1924: 232) by its ivory face and hind coxa, and the ivory marks on the mesosoma.