The genus Monocellicampa is reviewed. A diagnosis of the genus and the differences between Monocellicampa and Hoplocampa are discussed. Monocellicampa yangae Wei, n. sp., as a pest of Prunus salicina, is described from China. Monocellicampa pruni Wei, 1998 is redescribed and the male of the species is described for the first time.