Two new species of the prostigmatic mite genus Adamystis Cunliffe, 1957—A. theroni sp. nov. and A. ueckermanni sp. nov.—from Fars province, Iran are described and illustrated based on female specimens collected from soil, humus and leaf litter under oak trees (Quercus brantii Lindl, 1840 ). Adamystis theroni sp. nov. differs from its congeners in having a smooth dorsal shield encompassing setal rows c, d and e, chelicera with two setae, lateral lip with three adoral setae, and coxal setation of 2-4-4-4. Adamystis ueckermanni sp. nov.is unique in having the trichobothrial pair sci placed far apart from each other, and the large dorsal shield with a mixed reticulation pattern encompassing setal rows c, d, e, f and h. A diagnostic key to the four species of Adamystis known from Iran is also given.