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Despite being the most widespread blister beetle subfamily, Nemognathinae is unfairly understudied in China. In this study, a new genus and species, <i>Sinostenoria yangi</i> Pan, from northern China is described and illustrated. The antennae, elytra, hind wings, and claws of the new genus form a truly unique set of characteristics never observed in other genera of Nemognathini Laporte de Castelnau, 1840. Three species from China are newly recorded and illustrated: <i>Megatrachelus sibiricus</i> (Tauscher, 1812), <i>Zonitomorpha dollei</i> (Fairmaire 1889), and <i>Stenodera djakonovi</i> Aksentjev, 1978. The genus <i>Oreomeloe</i> Tan, 1981, is transferred from the tribe Meloini Gyllenhal, 1910, to Nemognathini based on an examination of the types. Aiming to test the morphology-based placement of the new genus, we conducted molecular phylogenetic analyses using two mitochondrial (<i>COI</i>, <i>16S</i>) and three nuclear markers (<i>28S</i>, <i>CAD</i>, <i>ITS2</i>). The results confirm our tribal assignment of the new genus and support a clade that consists of <i>Sinostenoria</i><b>gen. n.</b>, <i>Longizonitis</i> Pan and Bologna, 2018, <i>Stenoria</i> cf. <i>grandiceps</i>, and <i>Ctenopus</i> cf. <i>persicus</i>.