Feather mites (Acari: Astigmata: Analgoidea and Pterolichoidea) live in the plumage and on the skin of birds. Because of the huge diversity of birds in Brazil, several groups still remain almost unexplored concerning their feather mites. In this paper we describe a new feather mite species, Cathartacarus coragyps sp. n. (Gabuciniidae), from the Black Vulture, Coragyps atratus (Bechstein) (Cathartiformes, Cathartidae), and report seven species new for Brazil from birds of the orders Charadriiformes and Cariamiformes: Brephosceles chilensis Peterson, 1971 (Alloptidae), Bychovskiata chilensis Mironov and Dabert, 1995 (Avenzoariidae), Magimelia chilensis Dabert et al., 2002 (Pterolichidae), Sokoloviana chilensis Dabert and Ehrnsberger, 1996 (Ptiloxenidae), and Leptosphyra centropoda (Megnin, 1877) (Xolalgidae) from the Southern Lapwing, Vanellus chilensis (Molina), and Gabuciniella camptoloba Gaud and Atyeo, 1996 from the Red-legged Seriema, Cariama cristata (Linnaeus).[GRAPHICS]Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)