| abstract | Eighty-six species of intranasal chiggers in 16 genera are known to date. They occur on a variety of hosts—birds, reptiles, marsupials, bats, rodents and other small terrestrial mammals. A list of intranasal species with type host and locality is given. Twelve species in 2 genera are reported from New Guinea. Gahrliepia (Walchia) morobensis (Gunther) is established as an intranasal species for the first time. The remaining 11 new species in 2 genera, Gahrliepia (Walchia) and Ascoschoengastia (Laurentella), arc described and illustrated. The new species are: G. (W.) traubaudyi, A. (L.) indigella, A. (L.) melanesiana, A. (L.) modica, A. (L.) goilala, A. (L.) lorentzimys, A. (L.) libbymannae, A. (L.) accola, A. (L.) improcera, A. (L.) metatarsalis, and A. (L.) elongotarsala. Because of the distinctive niche that these species occupy in the host, it is postulated that the post-larval stages and unfed larvae are strictly nidicolous, e.g., subterranean nests of the hosts. A key to the New Guinea species, notes on biology, host and altitudinal distribution of nasal chiggers arc offered. |