16. Stenus tenuimargo Cameron, 1930

(Figs. 23 & 24)

Cameron, 1930: 459 (subgenus Mesostenus; Type locality: Darjeeling: Tista Valley, alt. 700 feet); Scheerpeltz, 1933: 1198 (subgenus Hemistenus); Puthz, 1978: 125 (aedeagus); Rougemont, 1981: 342 (Burma); Puthz, 1981a: 16 (Vietnam; China); Puthz, 1981b: 148 (characters); Rougemont, 1983b: 46 (Thailand); Zheng, 1993: 229 (characters); Herman, 2001a: 2416; Smetana, 2004: 547 (Palaearctic catalog); Puthz 2013a: 1401; Schülke & Smetana, 2015: 844 (Palaearctic catalog).

Material examined: China: Yunnan: Jinghong County, Forest Park, 2 males, 800 m, 26.VII.2004. Jie Wu leg.

(IZ-CAS); Jinghong County, Forest Park, 1 female, 800 m, 24. VII.2004. Jie Wu leg. (IZ-CAS); Guangxi: Napo County, Defu Country, Shuiyuanlin Reserve, 1 male, 1400 m, 5.IV.1998. Hai-Sheng Zhou leg. (IZ-CAS). Remarks: This species can be distinguished from S. zhangyejunianus Lv et Zhou, sp. nov. by the following characters: elytra spot smaller and aedeagus (Figs. 23A & 24A) more slender.

Distribution: China (Sichuan, Yunnan), Myanmar, Thailand, Vietnam, Laos, Pakistan, India, Bangladesh.