Two new gustavioid species, Stenoxenillus incisus sp. nov. and Xenillus setosus sp. nov., are described from Turkey. Taxonomic problems concerning the genera Liacarus, Stenoxenillus and Xenillus are briefly discussed. It is proposed that the genus Stenoxenillus is placed in the family Liacaridae. Two species, Liacarus coracinus (Koch, 1840) and Xenillus tegeocranus (Hermann, 1804) are recorded for the first time from this region and redescriptions are presented for these species.