Study on predatory mites of Aceria tristriatus (Nalepa, 1890) from Hamedan and Lorestan provinces, Western Iran Author Ahmad-Hosseini, Mohammad . Department of Plant Protection, College of Agriculture, Bu-Ali Sina University, Hamedan, Iran; E-mails: mahmad hoseini @ yahoo. com; mkhanjani @ gmail. com Author Khanjani, Mohammad . Department of Plant Protection, College of Agriculture, Bu-Ali Sina University, Hamedan, Iran; E-mails: mahmad hoseini @ yahoo. com; mkhanjani @ gmail. com Author Karamian, Roya . Department of Biology, Faculty of Science, Bu-Ali Sina University, Hamedan, Iran; E-mail: R _ karamian @ basu. ac. ir basu.ac.ir text Persian Journal of Acarology 2019 2019-04-15 8 2 125 145 journal article 10.22073/pja.v8i2.45640 2251-8169 4644893 4C425003-76FC-45EE-918E-FA17FEA2FC10 Pronematus rykei Meyer & Rodrigues, 1966 Diagnosis (female) Tarsus I longer than tibia I; ventral setae ( pt , mtα and mtβ ) longer than one third distance between bases of them, Seta e1 reach bases of f1 , setae c1 and d1 approximately equal in length. Full description of male and female of this species presented in Ahmad-Hosseini et al. (2017a) . Material examined Hamedan province : Heydareh village – 6 Jul. 2015 (n = 5) ; Shahrestaneh village – 17 Oct. 2016 (n = 5) , 15 Aug. 2017 (n = 4) ; Abshineh village – 5 Aug. 2016 (n = 3) , 12 Sep. 2016 (n = 2) . Lorestan province : Kahman canyon – 30 Jul. 2015 (n = 9).