New species of Empis (s. str.) (Diptera: Empididae) from the Northwest Caucasus

Four new species of the genus Empis belonging to the nominative subgenus are described from the Northwest Caucasus: E. (E.) arkhyziensis sp. nov. (Russia: Karachay-Cherkessia), E. (E.) cherkessica sp. nov. (Russia: Karachay-Cherkessia), E. (E.) temryukiensis sp. nov. (Russia: Krasnodarskiy Territory), and E. (E.) xanthopoda sp. nov. (Russia: Krasnodarskiy Territory). Empis (E.) albopilosa de Meijere, 1935 is recorded from the Caucasus for the first time.