Tetraserica rihai sp. n. Figures 43, 50

Type material examined.

Holotype: ♂ "Thai, N, Nan prov., Doi Phu Kha N.P., Headq., 19°13'N, 101°07'E, 28.iv-1.v.1999, M. Riha leg./ coll. P. Pacholátko / 124 Sericini Asia spec." (CPPB).

Description.

Length of body: 9.5 mm; length of elytra: 6.5 mm; maximum width: 5.5 mm. Surface of labroclypeus and disc of frons glabrous. Smooth area anterior to eye twice as wide as long. Eyes moderately large, ratio of diameter/interocular width: 0.56. Ratio of length of metepisternum/metacoxa: 1/1.69. Metatibia short and wide, ratio width/length: 1/3.06; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 43 F–I . Habitus: Fig. 43J.

Female unknown.

Diagnosis.

Tetraserica rihai sp. n. differs from T. nonglomensis sp. n. and T. nussi sp. n. by the dorsal lobe of left paramere being twice as long as the median ventral lamina of phallobase.

Etymology.

The new species is named after one of its collectors, M Riha (noun in genitive singular).