Two new species of the genus Chthonius (Ephippiochthonius) (Chthoniidae) are described from Cabrera (Balearic Is.), three species of the genus Chthonius (Ephippiochthonius), three species of the genus Microcreagrina (Syarinidae) and one species of the genus Rhacochelifer (Cheliferidae) from the Canary ls. (Tenerife, Gomera, La Palma), one species of Microcreagrina from Madeira and one species of the genus Apocheiridium (Cheiridiidae) from Ascension Is. are described and figured. Their affinities are discussed, an identification key is proposed for the five species of the genus Microcreagrina.