Plateros baolokensis Kazantsev, sp.n.

Figs 58, 183–184.

MATERIAL: Holotype, ♂, S Vietnam, Bao Lak, 1500 m, 24– 28.IV.1993, V. Siniaev leg. (ICM); paratypes: ♀, N Laos, 20 km NW Luang Namtha, 800–1000 m, 4–12.V.1997, Strba & Hergovits leg.; ♀, C Laos, Khammouan Pr., env. Nakai, Rte No. 8, 17°42.8´N, 105°08.9´E, 540–580 m, 4–8.V.1998, M. Strba & R. Hergovits leg. (ICM).

DESCRIPTION. Male. Dark brown to black; pronotum light brown with dark brown middle; elytra reddish brown, with dark brown longitudinal sutural stripes below scutellar area (Fig. 58).

Vertex with conspicuous round impression behind antennal prominence. Eyes moderately large, interocular distance ca. 1.2 times shorter than eye diameter. Labrum small, transverse, convex anteriorly. Palps slender; ultimate palpomeres longer than wide, narrow and almost parallel-sided, obliquely convex and flattened at apex. Antennal sockets separated by minute lamina. Antennae long, attaining to elytral four fifths, antennomeres 4–10 ramose, with ramus of antennomere 3 ca. 2 times shorter than stem, ramus of antennomere 7 ca. 1.15 times shorter than stem; antennomere 3 ca. 3 times longer than antennomere 2 and ca. 1.1 times shorter than antennomere 4; antennomeres 3–11 with long sub-erect pubescence (Fig. 58).

Pronotum transverse, ca. 1.4 times wider than long, trapezoidal, bisinuate basally and triangularly produced anteriorly, with prominent acute posterior and distinct blunt anterior angles. Scutellum transverse, parallel-sided, slightly incised at apex (Fig. 58).

Elytra long, ca. 3.5 times longer than wide at humeri, almost parallel-sided; with four prominent, almost equally developed primary costae, noticeably stouter than secondary ones; interstices with even rows of irregular subquadrate or roundish cells; pubescence dense, short and decumbent, almost obscuring reticulation (Fig. 58).

Legs slender; femoris and tibiae narrow, subequal in length (Fig. 58).

Aedeagus asymmetrical, with narrow phallobase and contiguous phallobasal lateral plates; median lobe spiral, moderately robust, provided with spine at coil bend and toothed at distal bend; coil plane perpendicular to proximal portion (Figs 183–184).

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

Length: 6.6–7.2 mm. Width (humerally): 1.5–1.8 mm.

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

DIAGNOSIS. Plateros baolokensis sp.n. may be separated from P. phungi Pic, 1923, also with ramose antennae, by the more narrow body and darker pronotum (Fig. 58), as well as by the conspicuously more twisted median lobe of the aedeagus (Figs 183–184).

DISTRIBUTION. Southern Vietnam, Laos.