The new genus, Cerogamasus gen. nov., with the type species Cerogamasus tibetensis sp. nov., is established. The new genus is easily distinguished from other genera of Parasitidae because the dorsal idiosoma in both sexes bears more than 40 pairs of setae, of which fewer than 7 pairs of podonotal setae are smooth; the seta z5 of the dorsal hexagon is similar to j5 and j6 in form (pilose or distally pilose) while different in length (z5 longer); the seta al of the palpfemur is pectinate, and al1 and al2 of the palpgenu are entire; the gnathotectum is trispinate; peritrematal shields in females are posteriorly free; and the palptrochanter in males has a pointed ventral protuberance. C. anhuiensis sp. nov., C. guizhouensis sp. nov. and C. multidentatus sp. nov. are described based on adult samples; C. tibetensis sp. nov. is described based on deutonymph and adult samples. Cycetogamasus coreanus Athias-Henriot, 1980, is transferred to Cerogamasus gen. nov. as a new combination.

The present study reports three new species of Psilogamasus . Among them, one species, Psilogamasus brachysaccatus Jin & Yao, sp. nov. from the Xizang Autonomous Region, China, was described and illustrated based on adult females and males. Two species, Psilogamasus decemtrichus Ren & Yi, sp. nov. and Psilogamasus bidens Ren & Yi, sp. nov. from Yunnan Province, China, were described and illustrated based on females. Parasitus truncatus Tseng is transferred from the genus Parasitus to Psilogamasus . A key to the known species of Psilogamasus is provided.

A cauda-like structure was found, firstly in Cunaxidae, and with it the new taxa Cunaxicaudinae Chen & Jin subfam. nov., and its two new genera, Cunaxicaudus Chen & Jin gen. nov. (type genus) and Brevicaudus Chen & Jin gen. nov., were erected. Cunaxicaudinae Chen & Jin subfam. nov. differs from the known members of the family Cunaxidae by the unique conspicuous cauda derived from the posterior end of the hysterosoma. The generic features of Cunaxicaudus Chen & Jin gen. nov. are as follows: the posterior of the hysterosoma elongated as a much longer cauda; palp between genu and tibiotarsus without apophysis; e1 closer to d1 than f1; and e1 closer to mid-line than c1 and d1. The generic features of Brevicaudus Chen & Jin gen. nov. are as follows: the posterior of hysterosoma elongated as a short cauda; palp between genu and tibiotarsus with one apophysis; distance between setae e1 and d1 approximately equal to e1; and f1, e1 as close to mid-line as c1 and d1 to mid-line. It is proposed that the specialized cauda may be the result of the evolution of the sperm transfer mode.

We describe two new mite species, namely, Neocunaxiodes huangshanensis Chen and Jin sp. nov. and N. pinus Chen and Jin sp. nov. from China. We also provide a species key of adult females of genus Neocunaxiodes from China.

Bdellidae (Acari: Prostigmata) are potential effective biological control agents on small arthropods. In this paper, three species, including two new to science, Odontoscirus cavernicolus Wu & Guo sp. nov. and Neomolgus bomiensis Wu & Guo sp. nov., and one newly recorded to Chinese fauna, Odontoscirus amamiensis Shiba, 1985 were described and illustrated in detail.

A new species, Schizosthetus yunnanensis Ren and Yi n. sp., is described based on adult female specimens, collected from the decomposing leaves of pine tree in south of China. A key to the species of Schizosthetus Athias-Henriot species is presented.