Stenocephalus medius Mulsant & Rey, 1870: 248. ST(S): France; lost.
Cimex gonymelas Donovan, 1798: 5 (nomen oblitum; syn. nov.). ST(S): Great Britain, Kent, Darent[h] Wood; lost.
Stenocephalus horvathi Reuter, 1888h: 67 (syn. Kerzhner, 1976: 31). LT (Moulet, 1995b: 358, as HT): male, China (NO), Beijing; MNHN.
Stenocephalus sibiricus Jakovlev, 1889d: 76 (syn. Kerzhner, 1976: 31). HT: male, Russia (ES), Krasnoyarsk Terr., Achinsk; ZMAS.
Stenocephalus medius var. brevis Horváth, 1899d: 448. STS: male, female, Azerbaijan, Lenkoran; MNHN.
Stenocephalus japonicus Lansbury, 1966e: 91 (syn. Kerzhner, 1976: 31). HT: male, Japan, Genjiyama, 6,000 feet; HNHM.