Twelve new species of Priceiella (Phthiraptera: Ischnocera: Philopteridae) from Old World babblers, with keys to species of two subgenera and checklists of species for the genus.

Twelve new species of chewing lice in the genus Priceiella Gustafsson Bush, 2017, are described from Old World "babblers" (Leiothrichidae, Paradoxornithiidae, Pellorneidae and Timaliidae). Eight species belong to the subgenus Thescelovora Gustafsson Bush, 2017: Priceiella (Thescelovora) calcicola n. sp. from Turdinus crispifrons crispifrons; Priceiella (Thescelovora) fuscicaena n. sp. from Malacopteron magnum magnum and Malacopteron cinereum cinereum; Priceiella (Thescelovora) orichalca n. sp. from Turdinus brevicaudatus leucostictus and four other host species; Priceiella (Thescelovora) chanthaburiana n. sp. from Megapomatorhinus hypoleucos tickelli and Pomatorhinus schisticeps klossi; Priceiella (Thescelovora) macrocephala n. sp. from Megapomatorhinus hypoleucos wrayi; Priceiella (Thescelovora) coleyae n. sp. ex Stachyris striolata tonkinensis; Priceiella (Thescelovora) austini n. sp. ex Pomatorhinus ruficollis intermedius; and Priceiella (Thescelovora) ornata n. sp. ex Psittiparus gularis fokiensis. The remaining four species belong to the subgenus Camurnirmus Gustafsson Bush, 2017: Priceiella (Camurnirmus) najeri n. sp. from Garrulax monileger stuarti and three other hosts; Priceiella (Camurnirmus) bohsae n. sp. from Garrulax strepitans; Priceiella (Camurnirmus) lindquistae n. sp. ex Ianthocincla chinensis chinensis; Priceiella (Camurnirmus) sonorae n. sp. ex Garrulax maesi maesi. We redescribe and illustrate Priceiella (Camurnirmus) rhinocichlae (Eichler, 1957). Keys to species of two subgenera, a comprehensive checklist of all the species of Priceiella, and a host-louse list are provided.