TO THE KNOWLEDGE OF THE <i>SPHECODESHYALINATUS</i> HAGENS SPECIES GROUP (HYMENOPTERA, HALICTIDAE)
Five species of the hyalinatus species group of the genus Sphecodes Latreille 1804 (Hymenoptera, Halictidae) are reviewed. Sphecodes maruyamanus Tsune-ki and S. murotai Tsuneki are found in Russia for the first time and S. hyalinatus Hagens is newly recorded from the Kuril Islands (Kunashir). Illustrated keys to males and females of all species of the hyalinatus species group are provided. An updated checklist of the 37 species of Sphecodes so far known from Russia is given.