In this paper, 17 species of the subgenus Seladonia (genus Halictus) from China are reported. One new species, H. (S.) multicarinatus sp. nov. is described. Two subspecies, H. (S.) confusus alpinus Alfken, H. (S.) confusus perkinsi Blüthgen, and 2 species, H. (S.) semitectus Morawitz and H. (S.) varentzowi Morawitz are newly recorded in China. A species checklist, a key to the species, a description of the new species, redescriptions of the newly recorded species and subspecies, and remarks for each species are given. The type specimens are deposited in the Institute of Zoology, Chinese Academy of Sciences, Beijing.