The eriophyoid mite fauna (Acari: Eriophyoidea) of the Tibet Autonomous Region, southwestern China was studied and 32 species were reported herein, among which six species are new to science. The new species and their hosts are as follows: Boczekella larixis n. sp. on Larix sp. (Pinaceae); Acaphyllisa deutziasis n. sp. on Deutzia schneideriana Rehd. (Saxifragaceae); Acaphyllisa populusis n. sp. on Populus sp. (Salicaceae); Aculops cajanusis n. sp. on Cajanus cajan (L.) Millsp. (Fabaceae); Aculops caraganis n. sp. on Caragana franchetiana Kom (Fabaceae); Tetra tibetisalix n. sp. on Salix heterochrom Seem. (Salicaceae). The purpose of this work was to investigate the varieties and distributions of eriophyoid mites in Tibet, summarize the species recorded in Tibet, and give references to mite taxonomists.

We studied the parasitism capacity of Spalangia endius as a pupal parasite of Bactocera dorsalis after switching hosts. We used pupae of B. dorsalis and M. domestica as the hosts and studied parasitism by S. endius in the laboratory. The parasitism capacities were compared at different host densities and different parasitoid ages. The two functional responses of S. endius fitted a Holling Type II equation. More M. domestica were parasitized than B. dorsalis at all the densities. The ability of S. endius to control M. domestica was α/T_h (parasitism capacity) = 32.1950, which was much stronger than that of control B. dorsalis, which was α/T_h = 4.7380. The parasitism rate of wasps that had parasitized B. dorsalis had decreased by the emergence time of parasitoids. These results suggest that the parasitoid-pest ratio should be 1:25 to maintain a relatively stable parasitism rate for control of B. dorsalis. The S. endius colony reared on M. domestica successfully controlled a low-density population of B. dorsalis in the lab. We provide evidence suggesting that the parasitism capacity of S. endius needs to be improved.

Three new eriophyoid mite species (Acari: Eriophyoidea: Eriophyidae) from China are described and illustrated. They are Cecidophyes truncatis sp. nov. on Acer truncatum Bunge (Aceraceae), Cecidophyes hirsutes sp. nov. on Cardamine hirsute L. (Cruciferae) and Paracolomerus fopingacer sp. nov. on Acer sp. L. (Aceraceae). All the new species described herein are vagrants on the host plant.