Two new species of the nemourid genus Mesonemoura from Yunnan Province of southwestern China are described, M. longiflagellata Xiao Qian sp. nov. from Pudatcuo National Park of Shangri-la City and M. tumida Qian Du sp. nov. from Cangshan Mountian of Dali City. The male and female terminalia of the new species are compared to related species.
Keywords: Plecoptera, Mesonemoura, new species, China.