A new genus and six new species of the family Cheyletidae (Acari) associated with birds are described. Among them, three species inhabit quills of feathers, Picocheyletus tricholaemae gen. nov., sp. nov. from Tricholaema hirsuta flavipunctata (Capitonidae) in Gabon, Metacheyletia amazonae sp. nov. from Amazona amazonica (Psittacidae) in Guyana, and Cheletopsis thalasseus sp. nov. from Sterna sandviciensis (Laridae) in the USA. Three other species are skin parasites, Apodicheles collocalia sp. nov. from Collocalia esculenta (Apodidae), and Neocheyletiella nectarinia sp. nov. from Nectarinia jugularis (Nectariniidae), both from the Philippines, and Neocheyletiella aegithali sp. nov. from Aegithalos concinnus (Aegithalidae) in Pakistan.