Five new eriophyid mite species from Egypt (Acari: Eriophyidae) associated with the weeds of the family Poaceae

Five new eriophyoid mites infesting weeds of the family Poaceae are described and illustrated from Egypt. They are Abacarus stagninis sp. nov. from Echinochloa stagnina (Retz.) P. Beauv., vagrants in grooves between veins on the upper leaf surface, causing discoloration of the leaves; and four new species from genus Aceria (A. echinochloae sp. nov., A. barnyardi sp. nov., and A. stagninis sp. nov.) from E. stagnina and E. crus-galli (L.) Beauv., and Aceria pennisetosa sp. nov., from Pennisetum purpureum Schumach. These species are vagrants underneath inner surface of the leaf sheath around stem and no symptoms were observed. However, A. barnyardi sp. nov. is a vagrant underneath inner surface of the leaf sheath around stem and are endoparasitic inside tissue of leaves causing rusted leaves.