Seasonal abundance of 18 species of the genus Aphytis Ho­ward (Hymenoptera : Aphelinidae) from Egypt were observed on ten host plants infested with eleven armored scale insect species (diaspid­ids) in seven governorates between 1997 and 2000. Results indicate that some species (e.g. Aphylls holoxanthus DeBach. Aphytis melinus DeBach and A. paramaculicomis DeBach & Rosen) had effective rates of parasitism on the population of Chrysomphalus aonidum, Aonidiella au­rantli and Pariatoria oleae (Colvee), respectively. The highest rates of parasitism were 70.9, 66.4 and 57.0%. respectively. This groups was followed by Aphytis lepidosaphes Compere, Aphytis paramculicomis De Bach & Rosen, Aphytis chrysompjali (Mercet), Aphytis lingnanensis, Aph­ytis diaspidids (Howard), Aphytis libanicus Traboulsi and A. phoenicis Do Bach & Rosen with maximum parasitism rates of 59.2, 57.0, 41.4, 43.2, 29.3. 28.6 and 20.4. respectively. The rest of studied Aphytis spades, maximum parasitism rates were between 0.8 and 14.6%.