A new species in the aphid genus Chucallis Tao, Chucallis latusigladius Qiao, Jiang & Chen, sp. n. feeding on a species of bamboo, Indocalamus tessellatus (Munro) Keng f., is described. It differs from the only other known species in the genus by having remarkably large marginal processes on abdominal tergite IV. A key to species, morphological descriptions, distributional data and host plant information are provided. The type specimens studied are deposited in the National Zoological Museum of China, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.
Keywords: Aphididae; Calaphidinae; China; Chucallis; new species.