An unusual new cicadellid genus, Ulopsina gen. nov. and two new species, U. sinica sp. nov. and U. szwedoi sp. nov. from China are described, illustrated, and placed in the subfamily Ulopinae. The genus has characters of both the tribes Mesargini and Coloborrhinini, suggesting that the delimitation of these tribes may not be natural. The tribal placement of Ulopsina is uncertain. A checklist of the subfamily Ulopinae from China is also provided, and nine Chinese species designated under the genus Moonia are herein transferred to Mesargus, namely Mesargus albomaculata (Li) comb. nov., M. brevita (Cai et Shen) comb. nov., M. castanea (Kuoh) comb. nov., M. hei (Cai et Shen) comb. nov., M. hirsuta (Li) comb. nov., M. hyboma (Cai et Kuoh) comb. nov., M. maculigena (Kuoh) comb. nov., M. serrata (Li and Zhang) comb. nov., and M. spinapenis (Li and Zhang) comb. nov.