Geomylichus perognathi sp. n. (Acari: Listrophoridae) from Perognathus spp. in the United States

A new species of listrophorid mite, Geomylichus perognathi, is described from pocket mice, Perognathus parvus and P. fasciatus, from Oregon, USA. It is closest to Geomylichus brevispinosus and G. inaequalis, but is distinguished from those and all others in the genus by the following: (1) shape of the postcapular shield which is completely striated; (2) length of the postcapular shield; (3) striated membranes of Coxae II; (4) the different thickness of sc e; and (5) the length of l 5 in the male.