Plateros raotensis Kazantsev, sp.n.

Figs 34, 131–132.

MATERIAL: Holotype, ♂, [N] Vietnam, mountains NW Dong Hoi, Rao-Te, 600 m, 24.III.1963, O. Kabakov leg. (ICM); paratypes: ♂ and ♀, same label; ♀, [N] Vietnam, mountains 50 km NE Thai Nguen, 300 m, 15.V.1963, O. Kabakov leg.; ♀, [N] Vietnam, mountains 50 km NE Thai Nguen, 300 m, 15.V.1963, O. Kabakov leg. (ICM and ZIN).

DESCRIPTION. Male. Dark brown to black; pronotum, except at disk, testaceous (Fig. 34).

Vertex with prominent round impression behind antennal prominence and minute deep round excavation at its bottom. Eyes moderately large, interocular distance ca. 1.2 times shorter than eye diameter. Labrum small, transverse, concave anteriorly. Palps slender; ultimate palpomeres noticeably longer than wide, almost parallel-sided in proximal two thirds, obliquely truncate and flattened at apex. Antennal sockets separated by minute lamina. Antennae attaining to elytral middle, antennomeres 3–10 flattened, distinctly pilose; antennomere 3 ca. 2.7 times longer than antennomere 2 and ca. 1.25 times shorter than antennomere 4; antennomeres 3–11 with dense short erect pubescence (Fig. 34).

Pronotum transverse, ca. 1.8 times as wide as long, with parallel sides, moderately bisinuate basally and semi-circularly produced anteriorly; with long acute, strongly protruding laterally posterior and rounded anterior angles. Scutellum subquadrate, narrowing distally, truncate at apex (Fig. 34).

Elytra long, ca. 4 times longer than wide at humeri, slightly widening from humeri; with four almost equally developed primary costae, not different from secondary ones; interstices with even rows of small roundish cells; pubescence scarce, short and decumbent (Fig. 34).

Legs slender; femoris and tibiae narrow, subequal in length (Fig. 34).

Aedeagus asymmetrical, with moderately narrow phallobase and almost obsolete phallobasal lateral plates; median lobe narrow and straight in proximal two thirds, bent in distal third, with conspicuous proximal nodosity (Figs 131–132).

Female. Similar to male, but eyes somewhat smaller and antennae slightly less dentate.

Length: 4.5–5.8 mm. Width (humerally): 1.1–1.3 mm.

ETYMOLOGY. The new species is named after the locality where the type series was collected.

DIAGNOSIS. Plateros raotensis sp.n. may be easily separated from the somewhat similar in the shape of the aedeagus P. planatus Waterhouse, 1879 by the coloration, less dentate antennae and long narrow posterior pronotal angles (Fig. 34), as well as by the distinctly less widened preapically median lobe of the aedeagus with conspicuous nodosity at base (Figs 131–132).

DISTRIBUTION. Northern Vietnam.