The bees of the genus Sphecodes Latreille 1804 of the Russian Far East, with key to species (Hymenoptera: Apoidea: Halictidae)

Eighteen species of the bee genus Sphecodes are recorded from the Russian Far East. Sphecodes orientalis Astafurova & Proshchalykin, sp. nov. is described from Primorskiy Territory, Jewish Autonomous Province, Khabarovsk Territory and Sakhalin. Five species: S. laticaudatus Tsuneki 1983, S. nippon Meyer 1922, S. okuyetsu Tsuneki 1983, S. simillimus Smith 1873, and S. tanoi Tsuneki 1983 are recorded for the first time from Russia. Six species: S. albilabris ( Fabricius 1793), S. cristatus Hagens 1882, S. longulus Hagens 1882, S. miniatus Hagens 1882, S. monilicornis ( Kirby 1802), and S. puncticeps Thomson 1870 are newly recorded from the Russian Far East. New synonymy has been established for S. crassus Thomson 1870 (=S. dyozankeanus Tsuneki 1983, syn. nov.; =S. ohdeyamanus Tsuneki 1984, syn. nov.); S. ferruginatus Hagens 1882 (=S. koikensis Tsuneki 1983, syn. nov.; =S. hanedai Tsuneki 1983, syn. nov.); S. geoffrellus ( Kirby 1802) (=S. silvicola Tsuneki 1983, syn. nov.); S. tanoi Tsuneki 1983 (=S. coptis Tsuneki 1983, syn. nov.); S. longulus Hagens 1882 (=S. amakusensis Yasumatsu et Hirashima 1951, syn. nov.); S. scabricollis Wesmael 1835 (=S. sibiricus Cockerell, 1924, syn. nov.). Illustrated key to males and females of all species known from the Russian Far East are provided.