New species of Medetera from Inner Mongolia, China (Diptera, Dolichopodidae, Medeterinae).  Only three species of Medetera Fischer von Waldheim were known from Inner Mongolia. Here the following ten new species of Medetera, of which three species belong to Medetera apicalis group and seven belong to Medetera diadema-veles group, are added to the fauna of Inner Mongolia: Medetera albens sp. n., Medetera bisetifera sp. n., Medetera flava sp. n., Medetera ganshuiensis sp. n., Medetera lihuae sp. n., and Medetera transformata sp. n., Medetera triseta sp. n., Medetera shiae sp. n., Medetera shuimogouensis sp. n., and Medetera xiquegouensis sp. n. A key to the species of Medetera from Palaearctic China is provided.