Studies on Histiostomatid Mites (Acari, Astigmata) Associated with the Burying Beetle, Nicrophorus concolor Kraatz (Coleoptera, Silphidae), I

Pelzneria uncinata, a new species of Histiostomatidae (Acari, Astigmata) is described from Japan, South Korea, Russian Far East and Tibet based on deutonymphs phoretic on adult Nicrophorus concolor Kraatz (Coleoptera, Silphidae). This species is mostly found on the hind wings and underside of elytra of the host beetles and readily distinguished from the known members of the genus by the following characteristics: 1) prodorsum with anterior margin well sclerotized, 2) among the dorsal hysterosomal setae, d1, e1 and h1 much longer than the others and provided with a few minute barbs distally, 3) seta w on tarsus III small, not longer than tarsal width at its insertion.