Two new species belonging to the Eriophyidae were found on Tilia begoniifolia Steven in Golestan province of Iran, and are described and illustrated herein. Eriophyes begoniifoliaesp. nov. was associated to round galls protruded on both surfaces of the leaves. Aculus namdarisp. nov. was vagrant on the leaf undersurface and no damage was observed on the infested plants.