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 Typhlodromus ( Anthoseius ) khosrovensis Arutunjan, 1971 ( Figs. 8–14 ) Diagnosis (female) Dorsal shield with four pairs of solenostomes ( gd2 , gd6 , gd8 , gd9 ); setae Z4 and Z5 serrated, ventrianal shield with four pairs of pre-anal setae and without pre-anal pores; fixed digits of chelicera with 4 teeth and movable digit with 1 tooth, basitarsus IV with knobbed macroseta. Female ( Figs. 8–12 ) Idiosoma oval; setal pattern: 12A-8A/JV: ZV. All setae smooth, except Z4 and Z5 , serrated. Dorsum ( Fig. 8 ) – Dorsal shield reticulated, 315 – 325 long, 152 – 168 wide at level of setae R1 . Length of setae: j1 21–23, j3 31–33, j4 19–21, j5 20–23, j6 24–27, J2 27–30, J5 4–5, z2 22–24, z3 28–31, z4 29–31, z5 20–21, Z4 44–47, Z5 58–61, s4 34 –37, s6 35 –38, S2 40 –42, S4 36 –38, S5 15 – 16, r3 26–28, R1 27–29. Venter ( Fig. 9 ) – Sternal shield smooth and posterior margin with median lobe, with 2 pairs of equally long setae ST1-2 (29 – 31) and 2 pairs of lyrifissures ( iv1–2 ). The third ( ST3 30 – 32) and fourth ( ST4 28 – 31) each set on a platelet. Genital shield 117–125 long, 60–65 wide at level setae ST5 , with 1 pair setae, ST5 28–33 long. Ventrianal shield reticulated, 110–115 long, 74–79 wide at level of ZV2 . Pre-anal region with 4 pairs of pre-anal setae and without pre-anal pores. Opisthogastric cuticle bearing 4 pairs smooth setae and 5 pairs of lyrifissures. Chelicerae 127–134 long; fixed digit with 4 teeth and 26–29 long, pilus dentilis 5–6 long, movable digit 25–27 long and with 1 tooth ( Fig. 10 ). Calyx of spermatheca bell shaped 10 –11 long and 8–9 wide at junction with vesicle ( Fig. 11 ). Peritreme stippled, 65–69 long and reaching to level of setae r3 ( Fig. 8 ). Length of legs I–IV (excluding pretarsus): 275–284, 230–239, 235–245, 305– 318, respectively. Leg IV with a knobbed macroseta on basitarsus 49–52 long ( Fig. 12 ). Setal formulae of legs (I-IV): femur 12-10-6-6, genu 10-8-7-7, tibia 10-7-7-6. Male ( Figs. 13, 14 ) Idiosoma oval; Setal pattern: 12A-8A/JV-4: ZV-1,3. Dorsum – Dorsal shield reticulated, 245-260 long, 130–138 wide at level of setae R1 . Length of setae: j1 16–18, j3 24–27, j4 16–18, j5 17–19, j6 18–21, J2 22–24, J5 4–5, z2 17–19, z3 24–27, z4 25–28, z5 17–18, Z4 38–42, Z5 40–43, s4 26 –29, s6 28 –31, S2 29 –32, S4 24 –28, S5 17 –19, r3 21–23, R1 18–20. Venter ( Fig. 13 ) – Sternal shield smooth, with 5 pairs of setae subequal in length ( ST1-5 18– 21) and three pairs of lyrifissures ( iv1–3 ); ventrianal shield reticulated, subtriangular; anterior margin convex. Pre-anal region with 4 pairs of pre-anal setae and 3 pairs of pre-anal pores. Opisthogastric cuticle bearing 1 pair of smooth setae and 3 pairs of lyrifissures. Chelicerae 78–85 long; fixed digit with 4 teeth, pilus dentilis 3–4 long, movable digit with 1 tooth. Spermadactyl 17–19 long and inverse boot shaped ( Fig. 14 ). Peritreme 34–38 long and extending to level of setae r3 . Length of legs I–IV (excluding pretarsus): 235–244, 198–205, 195– 205, 259–268, respectively. Leg IV with a knobbed macroseta on basitarsus 33–37 long. Setal formulae of legs is identical to the female. Material examined Hamedan Province : Heydareh village – 9 Sep. 2014 (n = 11), 9 Oct. 2015 (n = 16), 3 Dec. 2015 (n = 3), 11 Sep. 2016 (n = 9), 9 Oct. 2016 (n = 8), 18 Nov. 2016 (n = 12), 30 Oct. 2017 (n = 3); Shahrestaneh village – 19 Nov. 2014 (n = 9), 17 Oct. 2016 (n = 8), 15 Sep. 2017 (n = 11); Ganjnameh – 18 Sep. 2015 (n = 5), 1 Nov. 2015 (n = 12); Asadabad – 19 Oct. 2015 (n = 4), 9 Nov. 2016 (n = 12); Faculty of Agriculture of Bu-Ali Sina University – 21 Oct. 2015 (n = 8); Velashjerd village – 5 Sep. 2017 (n = 4). Lorestan Province : Kahman canyon – 26 Sep. 2015 (n = 6); Aleshtar county – 4 Sep. 2015 (n = 3); Kakareza village – 25 Sep. 2016 (n = 6).