Palaearctic species of Rhamphomyia (Pararhamphomyia) anfractuosa group (Diptera, Empididae)

Palaearctic species of the Rhamphomyia (Pararhamphomyia) anfractuosa group are revised. Rhamphomyia (Pararhamphomyia) biflexata sp. n., R. (Pararhamphomyia) lineodorsata sp. n., R. (Pararhamphomyia) nudiscutellata sp. n., and R. (Pararhamphomyia) shatalkini sp. n. (all from Russian Far East) are described and illustrated. A key to Palaearctic species of the Rhamphomyia (Pararhamphomyia) anfractuosa group is provided