One new genus and four new species of eriophyoid mites from Hainan, China are described and illustrated in this paper： Dicoxiseta Wang, Tan ＆ Yang, gem nov., D. litsea Wang, Tan ＆ Yang, sp. nov. infesting Litsea monopetala （Roxb.） Pers. （Lauraceae）, Eriophyes casearius Wang, Yang ＆ Tan, sp. nov. infesting Casearia glomerata Roxb. （Flacourtiaceae）, Phyllocoptruta alstonia Wang, Gu ＆ Tan, sp. nov. infesting Alstonia scholaris （L.） R. Br. （Apocynaceae） and Aculus paederius Wang, Gu ＆ Tan, sp. nov. infesting Paederia scandens （Lour.） Merr. （Rubiaceae）. Tegolophus artocarpi Keifer, 1977 is newly recorded from China. E. casearius Wang, Yang ＆ Tan, sp. nov. distorts severely new foliage of its host plant. Three species, P. alstonia Wang, Gu ＆ Tan, sp. nov., A. paederius Wang, Gu ＆ Tan, sp. nov. and T. artocarpi, cause rust on the undersurfaces of host plants, while D. litsea Wang, Tan ＆ Yang, sp. nov. is a vagrant on the undersurface of host plant leaves, without visible symptom.
记述羽爪瘿螨属4新种:当归藤羽爪瘿螨Diptilomiopus embeliae Wang et Lu,sp.nov.,毛蕊茶羽爪瘿螨Diptilomiopus camelliae Wang et C hen,sp.nov.,糙皮桦羽爪瘿螨Diptilomiopus betulae W ang et T an,sp.nov.和拟柃木羽爪瘿螨Diptilomiopus paraeuryae Wang et Tao,sp.nov.。
Three new species in the genus Tegonotus from China are described and illustrated： Tegonotus exbucklandiae sp. nov. infesting Exbucklandia populnea Brown（Hamamelidaceae）, Tegonotus parabaenae sp. nov. infesting Parabaena sagittata Miers（Menispermaceae） and Tegonotus pini sp. nov. infesting Pinus massoniana Lamb.（Pinaceae）. All species described here are vagrants on the surface of host leaves. Akey to the species of Tegonotus from China is provided.
Three new species of the tribe Phyllocoptini from China are described and illustrated in this paper, namely Caliphytoptus illigerae sp. nov., Leipothrix schima sp. nov., and Paracaliphytoptus alnus sp. nov. The genus Caliphytoptus is firstly recorded from China.
