Two new species of eriophyoid mites are described and illustrated from Guangxi, China: Acaphylla quercus sp. nov. collected on Quercus glauca Thunb. (Fagaceae), Rhyncaphytoptus miliusius sp. nov. collected on Miliusa sinensis Finet Gagnep. (Annonaceae). We further report Cecidodectes euzonus Nalepa, 1917, collected on Trema tomentosa (Roxb.) H.Hara (Cannabaceae), for the first time from China. All the species are vagrants on lower leaf surface causing no apparent damage to their host plants.