Surveys were carried out to assess Phytoseiidae (Acari: Mesostigmata) diversity in various habitats and ecosystems during the last two years in Russia. This study aimed to provide a review of the Russian species belonging to the genus Transeius Chant & McMurtry (Acari: Phytoseiidae) mostly based on the materials collected in this study as well as previous records. As a result, T. avetianae (Arutunjan & Ohandjanian) and T. proximus (Kolodochka) are reported for the first time in Russia. In addition, Transeius kornosorae Döker & Khaustov sp. nov. is described based on females. Furthermore, an identification key is provided for Russian species of the genus.