In this paper, four new species of the Deltocephalinae are described from Taiwan: Yamatotettix nigrilineus sp. nov., Xestocephalus spinestyleus sp. nov., Phlogotettix nigriveinus sp. nov., and Sorhoanus binotatus sp. nov.. The type specimens are deposited in the National Museum of Natural Science (NMNS), Taichung, Taiwan, the Department of Entomology, Chung Hsing University (DECHU), Taichung, Taiwan, and the Institute of Entomology, Guizhou University (IEGU), Guizhou, China.