Abstract
Three new species of oribatid mites are described from Sengokubara Moor in Hakone. Their names and characteristic features (in parentheses) are as follows : Hoplophthiracarus inoueae sp. n. (granular structure on the anterior part of aspis), Malaconothrus yamamotoi sp. n. (thick and barbed rostral setae and long and smooth notogastral setae), Protoribates hakonensis sp. n. (small body, sensilli with a distinct head and setae le longer than setae ro).