Hoplocampa smithiana, new species from China, Yunnan, is described from an adult female. Larval host is probably Sorbus ursina (Rosaceae). It is compared with H. sinobirmana Malaise, the only other of the now three Hoplocampa species recorded in the Oriental Realm that is likewise pale-coloured, and keyed together with three further Palaearctic species which have a similar colour pattern, and are associated with Sorbus species as hosts. Closest to H. smithiana among known species in CO1 barcoding and morphology is however H. oregonensis (Ashmead), distributed in North West America, also with a Sorbus species as recorded host. It is tentatively suggested that H. smithiana and H. oregonensis represent one of the few recorded cases of a tenthredinid lineage with a disjunct East Asian-North American distribution.