Material of the paederine genus Lathrobium Gravenhorst, 1802 from the Chinese province of Guangxi is examined. Five apterous species are identified, two of which are described as new to science: L. damingense Peng & Li sp. n. (Daming Shan) and L. hujiayaoi Peng & Li sp. n. (Maoer Shan). The female sexual characters of L. proprium Peng & Li are described and illustrated for the first time. With the newly described species in this paper, the Lathrobium fauna of Guangxi constitutes 9 species, that of the entire mainland China 168 species.