The member of phytoseiid mites (Mesostigmata: Phytoseiidae) are well known, cosmopolitan and important predatory mites in the subclass Acari and already some of them are introduced as biological control agents of some small insect pests such as thrips and phytophagous mites especially TSSM, Tetranychus urticaeKoch (Prostigmata: Tetranychidae), with economic importance and extinctive host range (Chant & McMurtry, 1994; Asali Fayaz et al., 2011). In this study, the specimens were collected from some aerial parts of stone fruit trees such as peach, plum, sweet cherry and sour cherry (by shaking and beating method of the shoots and foliages on withe tray) in 2014-2015. The mites were directly mounted on slides in Hoyer’s medium, using a stereomicroscope (Walter, & Krantz, 2009). The slides were dried in an oven at about 50 °C and examined under an Olympus BX51 microscope (Differential Interference Contrast). All specimens are deposited in the Collection of the Acarology Laboratory, University of Bu–Ali Sina, Hamedan, Iran. In this survey, Typhlodromus(Anthoseius) bagdasarjaniWainstein & Arutunjan, 1967 and Typhlodromus(Anthoseius) khosrovensisArutunjan, 1971 were commonly found in the region considered. The phytoseiid mites play an important role in decrease of the Tetranychid mite damages in the region. Consequently, chemical control will be reduced.
