Diaphorus nigricans Meigen, 1824, Syst. Bechr., 4: 33. Type locality: not given.
Diaphorus obscurellus Zetterstedt, 1838, Insecta Lapp.: 706. Type locality: Sweden.
Diaphorus skolovi Stackelberg, 1928, Russk. Ent. Obozr., 22(1–2): 73, Type locality: Siberia orien talis (Russia).
Material examined One male, Guizhou: Guiyang, Huaxi (1000 m), 27. V. 1981, Fasheng Li; 1 male, Guangdong: Conghua, Liuxihe, 16. VII. 2003, Xingyue Liu.
Distribution Guangdong, Guizhou, Henan, Sichuan, Yunnan; Palaearctic, Nearctic and Neotropical regions.