Four new sawfly species belonging to Tenthredinoidea from Mt. Shiwandashan, Guangxi, China are described: Pristiphora nigrotarsalina Wei sp. nov., Metallus nigrofemoratus Wei sp. nov., Allantus xanthomaculatus Wei sp. nov.. and Arge southina Wei sp. nov.. Their type materials are deposited in the Insect Collection of Central South Forestry Un...