Five new species of the genus Walker, 1865 from Xizang Autonomous Region, China (Lepidoptera, Noctuidae, Noctuinae).

Five new species of the genus Walker, 1865 (, , , , and , are described from Autonomic Region Xizang, China (Tibet). is distributed in Nepal and China, and the Himalayan species Kovács, G. Ronkay & L. Ronkay, 2018 is reсorded for China for the first time. The occurrences of Boursin, 1967 in Nepal is questionable taking in the account the presence of two externally hardly distinguishable species, and New collecting data for Han & Li, 2007 and Hampson, 1911 in China are presented. Five species groups are reviewed, and three species groups are designated.