Nazeris rugosus Hu & Qiao, sp. n.

(Figs 3, 17–24)

Type material. Holotype: CHINA: male, ‘ China: Guangxi Prov., Xing'an County, Mao'ershan N. R., alt. 2100 m, 10.VII.2011, Tang & He leg.’ (SNUC). Paratypes: 1 male, same data as holotype; 1 female, same data, except ‘ Zhong Peng leg. ’; 2 males, 1 female, same data, except ‘ 2000–2100 m, 22.VII.2012, Hu & Song leg. ’.

Description. Body length 5.1–5.9 mm; forebody length 2.8–2.9 mm.

Body (Fig. 3) reddish brown; abdomen dark brown; antennae and legs yellowish brown.

Head (Fig. 17) 1.04–1.07 times as long as wide; punctation moderately dense, moderately coarse, distinctly umbilicate, not confluent; both dorsal and ventral surface of head with fine microsculpture (Figs 18, 19); postocular portion approximately twice as long as eye length.

Pronotum (Fig. 17) 1.16–1.20 times as long as wide, 0.95–0.99 times as long and 0.85–0.89 times as broad as head; punctation non-umbilicate, moderately dense and as coarse as that of head; midline posteriorly with very short and narrow impunctate elevation; microsculpture similar to that of head.

Elytra (Fig. 17) 0.64–0.68 times as long as wide, 0.55–0.59 times as long and 1.02–1.05 times as broad as pronotum; punctation as dense as, and slightly less coarse than that of pronotum; interstices lacking microsculpture.

Abdomen with punctation dense and coarse on tergites III–IV, dense and less coarse on tergite V–VI, moderately dense and fine on tergites VII–VIII; interstices with fine microsculpture (Fig. 20).

Male. Sternite VII (Fig. 21) with posterior margin simply rounded in the middle. Sternite VIII (Fig. 22) with Vshaped posterior excision. Aedeagus (Figs 23, 24) with ventral process gradually with acute apex in ventral view, with pair of wing-like basal laminae ventrally; dorso-lateral apophyses very slender, not reaching apex of ventral process.

Distribution and habitat. The species is known only from Mao'ershan in northeast Guangxi. The specimen was collected by sifting leaf litter at altitudes of 450–1750 m.

Comparative notes. The new species is distinguished from all the known species of Nazeris from Guangxi and adjacent area by the microsculpture covered on head, pronotum and abdomen, and by the distinctive shape of the aedeagus, particularly the apically narrowed ventral process (Fig. 23).

Etymology. The specific epithet (Latin, adjective: rugose) alludes to the microsculpture of the body.