The family Oestridae in Egypt and Saudi Arabia (Diptera, Oestroidea).

All known taxa of the family Oestridae (superfamily Oestroidea) in both Egypt and Saudi Arabia are systematically catalogued herein. Three oestrid subfamilies have been recorded in Saudi Arabia and/or Egypt by six genera: (Gasterophilinae), , (Hypodermatinae), , , and (Oestrinae). Five spp. have been recorded in Egypt, namely, (Linnaeus), (De Geer), (Linnaeus), (Loew), and (Fabricius). Only two of these species have also been recorded in Saudi Arabia, namely: (De Geer) and (Linnaeus). The subfamily Hypodermatinae is represented in the two countries by only four species in two genera, namely, (Linnaeus) and Brauer (in Egypt only), and (Villers) (in Saudi Arabia only) and (Brauer) (in both countries). The subfamily Oestrinae is represented by two widely distributed species in both countries, namely, (Clark) and (L.), in addition to another species represented in Egypt only, (Brauer). For each species, synonymies, type localities, distribution, Egyptian and Saudi Arabian localities with coordinates, and collection dates are presented.