Two new species of the genus Discoelius Latreille (Hymenoptera, Vespidae, Eumeninae) from China, with a key to the Chinese species

Two new species, namely Discoelius nigriclypeus Zhou and Li, sp. n. from Hunan, China, and Discoelius emeishanensus Zhou and Li, sp. n. from Sichuan, China, are described. A key to the Chinese species of the genus is provided, along with illustrations of the new species. Type specimens of these two new species are deposited in the Institute of Entomology and Molecular Biology, Chongqing Normal University.