This paper records 25 species or subspecies of the subfamilies Prioninae and Cerambycinae from Saudi Arabia, giving a total for the family Cerambycidae of 54 species or subspecies. Eight new species and one new genus are described and illustrated: Plocaederus elongatulus n.sp., Derolus asiricus n.sp., Derolus vastus n.sp., Prosype juniperi n.sp., Iranobrium brancuccii n.sp., Iranobrium buettikeri n.sp., Ossibia picata n.sp., and Mourgliana conspicua n.gen. et n.sp. Two species are recorded for the first time from the Arabian Peninsula and four from Saudi Arabia. Derolus mauritanicus iranensis Pic is raised to a full species; the replacement name Monocladum aegyptiacum granulipenne nom. nov. is proposed for the junior homonym Monocladum aegyptiacum arabicum (Fuchs, 1969); and the following four taxa are considered to be new subjective synonyms: Cantharocnemis arabicus Fuchs, 1969 = Cantharocnemis spondyloides Serville, 1831; Derolus mauritanicus iranensis Lepesme & Breuning, 1985 = Derolus iranensis Pic, 1956; Jebusaea persica Reitter, 1907 = Jebusaea hammerschmidti Reiche, 1877; Digonium Pic, 1895 = Lygrus Faehroeus, 1872.
