Four new species of the planthopper genus Metanigrus Tsaur, Yang & Wilson from China (Hemiptera, Fulgoromorpha, Meenoplidae)

Four new species of the genus Metanigrus Tsaur, Yang & Wilson, 1986, M. chromus Lv & Chen, sp. nov., M. guttatus Lv & Chen, sp. nov., M. gremius Lv & Chen, sp. nov., and M. spinatus Lv, Chen & Bourgoin, sp. nov. from China (Hubei, Guizhou and Yunnan), are described and illustrated, giving the genus six species in total. A key to all known species of Metanigrus is provided, as well as a map of their geographic distributions.