The Stenus flammeus group is proposed and twelve new species of the group are described: Stenus corniculus sp. n., Stenus daicongchaoi sp. n., Stenus jiajinshanus sp. n., Stenus jindingianus sp. n., Stenus paraflammeus sp. n., Stenus pengzhongi sp. n., Stenus pseudoflammeus sp. n., Stenus punctidorsus sp. n., Stenus tuyueyei sp. n., Stenus xilingmontis sp. n., and Stenus zhoudeyaoi sp. n. from Sichuan Province, and Stenus dabashanus sp. n. from Shaanxi Province. Their diagnostic characters are illustrated and a key to species of the group is provided.
Keywords: China; Coleoptera; Staphylinidae; Stenus flammeus group; identification key; new species.