A list of Acaridiae Latrelle, 1902 species described and illustrated on the basis of material collected from different habitats (stored products, birds and mammals’ nests, insects, soil, plants. fruits, bulbs, animal excremiits and sheds. house-dust) iii upper and lower Egypt during the period from I 96i to 1997. Sixteen genera and forty species proved Lo be new for Egyptian fauna arid for science as well. The species belonging lo foui families were recorded. These families are: Histiostoniatidae. Glycyphagidae, Acaridae and Saproglyphidae, and are represented by 23. 8. 8 and I species. respectively.