Two new feather mite species of the genus Proterothrix Gaud, 1968 (Analgoidea: Proctophyllodidae: Pterodectinae) from Red-tailed Laughingthrush Trochalopteron milnei (Passeriformes: Leiothrichidae) in China

Two new feather mite species of the genus Proterothrix Gaud, 1968 (Proctophyllodidae: Pterodectinae) collected in China from the Red-tailed Laughingthrush Trochalopteron milnei (Passeriformes: Leiothrichidae) are described: Proterothrix papilio sp. n. and P. nanduhensis sp. n. Both new species belong to the paradoxornis species group in having in males seta e of tarsus I lanceolate and aedeagus long whip-shaped. Males of P. papilio have a unique distinctive character within the genus: a pair of stick-like pregenital sclerites; in other species of the genus this sclerite, if present, is represented by single median sclerite. Females of this species have setae h2 with a terminal filament, setae h1 situated at the level of supranal concavity, and genual setae mGI, mGII thick spiculiform. Males of P. nanduhensis have the aedeagus extending beyond lobar apices by almost half its length and the opisthosomal lobes elongated, attenuate to apex, with posterior ends rounded. Females of this species have lateral margins of prodorsal shield with small round incisions in anterior quarter, at level of trochanters I.