Five new species of Rosensteiniidae are described from Indonesia, one from a bat Cheiromeles jacobsoni (Thomas, 1923) (Molossilichus macrobursatus spec. nov.) and four from the earwig Xeniaria jacobsoni Burr, 1912, living in the guano of this bat (Micronychites postverrucosus spec. nov., Nycteriglyphus xeniariae spec. nov., Nycteriglyphus longipilis spec. nov. and Xeniarioptes scutellatus gen. nov., spec. nov.).