Abstract
Two new species of eriophyid mites, Acalitus alnusae n. sp. from Alnus glutinosa (L.) Guertin. and A. subcordata (L.) C.A. Meyer (Betulaceae), and Aceria castaneifoliae n. sp. from Quercus castaneifolia C. A. Meyer (Fagaceae), are described from Iran. The new species are compared with related species and illustrated. Additionally, two new records of eriophyid mites from Iran are given. They are Aceria geranii (Canestrini) and Aceria pterocaryae Kuang and Gong.
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