Key to species of the Phytoseiidae treated in this paper 1. Setae J2 present...................................................................... Neoseiulus Hughes ...2 - Setae J2 absent................................................................... Proprioseiopsis Muma ...6 2. Spermatheca with atrium forked at juncture with major duct.................................................... 3 - Spermatheca with atrium not forked at juncture with major duct................................................. 4 3. Calyx trumpet-shaped, genu IV with macroseta............................................... N. makuwa (Ehara) - Calyx saccular, genu IV without macroseta.................................................. N. saudiensis n. sp. 4. Calyx of spermatheca bell-shaped; atrium moderately elongate.......................... N. conterminus (Kolodochka) - Calyx of spermatheca bowl-shaped; atrium nodular........................................................... 5 5. Stalk clearly present between the calyx and atrium; seta Z5 longer than 75µm, movable digit of chelicera with one tooth...................................................................................... N. bicaudus (Wainstein) - Stalk hardly seen between calyx and atrium; seta Z5 shorter than 75µm, movable digit with two teeth............................................................................................... N. rambami (Swirski & Amitai) 6. Calyx of spermatheca pocular............................................................... P. asetus (Chant) - Calyx of spermatheca saccular........................................................................... 7 7. Sternal shield smooth at the central region; all surface of genital shield smooth; atrium of spermatheca compact to base of the calyx; internal surface of calyx base appears convex......................................... P. messor (Wainstein) - Sternal shield reticulate at the central region; genital shield with lateral striae; atrium nodular; internal surface of calyx base is normally rounded...................................................................... P. ovatus (Garman)

Published as part of Negm, Mohamed W., Alatawi, Fahad J. & Aldryhim, Yousif N., 2012, A new species of Neoseiulus Hughes, with records of seven species of predatory mites associated with date palm in Saudi Arabia (Acari: Phytoseiidae), pp. 57-64 in Zootaxa 3356 on pages 62-63, DOI: 10.5281/zenodo.281593