Further investigations of the mite genus Syringophiloidus Kethley, 1970 (Acariformes: Syringophilidae) from North American passerines.

Four new syringophilid species of Syringophiloidus Kethley, 1970 are described from North American passerines: S. zonotrichia n. sp. from Zonotrichia albicolis (Gmelin) (Emberizidae) on Texas; S. jackowiaki n. sp. from Poecile carolinensis (Auduborn) (Paridae) in Texas; and S. xanthocephalus n. sp. from Xanthocephalus xanthocephalus (Bonaparte) (Icteridae) and S. agelaius n. sp. from Agelaius phoeniceus Linnaeus (Icteridae), both from Arizona. Spizella breweri (Cassin) (Emberizidae) from California is a new host for Syringophiloidus sialius Skoracki, Flannery & Spicer, 2009; and Melospiza lincolnii (Auduborn) (Emberizidae) from Texas and Vermivora ruficapilla (Wilson) (Parulidae) from California are new hosts for S. seiuri (Ckark, 1964). S. daberti Bochkov, Fain & Skoracki, 2004 from Passerina ciris Linnaeus (Cardinalidae) is recorded in the USA for the first time. A table with the host associations and distribution of all of the North American species of Syringophiloidus is given.