Dianous hainanensis Puthz, 1997

(Figs. 4, 25–33)

Dianous hainanensis Puthz, 1997: 104 .

Material examined. China: Hainan: 2♂♂ 1♀, Ledong County, Jianfengling, 16.XI.2006, Li-Zhen Li leg. (SHNU); 1♀, Lingshui County, Diaoluoshan, alt. 900 m, 18.XI.2006, Li-Zhen Li leg. (SHNU) ; 3♂♂ 1♀, Ledong County, Jianfengling, 18°44′N, 108°50′E, alt. 900 m, 2.V.2009, Hu & Yin leg. (SHNU) ; 1♀, Changjiang County, Bawangling, alt. 1000 m, 13. IV.2010, Feng & Yuan leg. (SHNU) ; 2♂♂, Lingshui County, Diaoluoshan, alt. 1000 m, 20. IV.2010, Yuan leg. (SHNU) ; 6♂♂ 3♀♀, Wuzhishan City, Wuzhishan, 18°54′N, 109°41′E, alt. 650–700 m, 18–21.IV.2012, Peng & Dai leg. (SHNU) ; 1♀, Lingshui County, Diaoluoshan, 18°43′N, 109°51′E, alt. 1000 m, 24.IV.2012, Peng & Dai leg. (SHNU) ; Yunnan: 5♂♂ 5♀♀, Xishuangbanna, 55 km, 8.VII.2003, Hu & Tang leg. (SHNU) ; 1♂ 1♀, Nabanhe N. R., Bengganghani 14.I.2004, Li & Tang leg. (SHNU) ; 1♂, Nabanhe N. R., Bengganghani, Nanmugahe, 22°08′N, 100°34′E, alt. 1700 m, 13.XI.2008, Hu & Tang leg. (SHNU) ; 1♂, Nabanhe N. R., Xiaonuoyouxiazhai, 22°13′N, 100°35′E, alt. 1500 m, 19.XI.2008, Hu & Tang leg. (SHNU) ; 1♂, Nabanhe N. R., Nabancun, 22°10′N, 100°39′E, alt. 720 m, 22.XI.2008, Hu & Tang leg. (SHNU) .

Measurements. BL: 6.2–6.6 mm, FL: 3.2–3.4 mm. HW: 1.23–1.34 mm, PL: 0.91–1.00 mm, PW: 0.74–0.82 mm, EL: 1.32–1.41 mm, EW: 1.17–1.29 mm, SL: 1.11–1.22 mm. Head 1.03–1.08 times as wide as elytra, pronotum 1.15–1.27 times as long as wide, elytra 1.09–1.15 times as long as wide.

Distribution. China (Yunnan, Hainan).

Remarks. The species was originally described from Hainan, and this is the first time for the species reported from Yunnan. Aedeagal inner sac with tridentical apex and valvifer with bidentical apical projection are important characters to the speices. Few differences of aedeagus and valvifers between the populations from Hainan and those from Yunnan are considered as the variation of the species.