| abstract | Two new species of oribatid mites of the genus Epidamaeus are described from larch and birch forests in Central Mongolia. The first new species, Epidamaeus crassisensillatus spn. can be distinguished from the closely related species by having a relatively thick and expanded sensillus, with the structure of vntral enantiophyses, the presence of fewer setae on the femur II and tarsus IV, and the smaller body size. The second new species, E. brevisetosus spn.n. canbe distinguished from its congeners by the character of notogastral setae and sensillus, the complete absence of the ventral enantiophyses E2, V and discidium, the different number of setae on femora II-IV, tarsi II-IV, and smaller body size. |