A new planthopper genus, Gigasanalis Long & Chen gen. nov. (Hemiptera, Fulgoromorpha, Achilidae, Achilinae, Achilini) is established from South China (Hainan Province). A new species, Gigasanalis jianfenglingensis Long & Chen sp. nov., is described and illustrated.
Two new species of the treehopper genus Machaerotypus Uhler, 1896, M. stigmosus Li & Chen sp. nov. and M. nodulus Li & Chen sp. nov., are described and illustrated from Guizhou Province, China. A checklist and key to species of Machaerotypus are provided with a map of geographic distribution.