Abstract
Four species of Tetranychidae are recorded for the first time from Kazakhstan: Eurytetranychus admes Pritchard et Baker, 1955, Eotetranychus thujae (McGregor, 1950), Oligonychus karamatus (Ehara, 1956), and Schizotetranychus schizopus (Zacher, 1913). The characters differentiating two morphologically similar species, the autochthonous Eurytetranychus furcisetus Wainstein, 1956 and the alien Eu. admes, are discussed. The latter species is recorded for the first time on a new host plant, Picea schrenkiana Fisch. et C.A. Mey. The presence of Oligonychus piceae (Reck, 1953) in the Trans-Ili Alatau (Southeastern Kazakhstan) is confirmed; the species was apparently introduced there together with Pinus sylvestris L.