This paper reports 55 species of Vespoidea from Yunnan province, China. Among them, a new species Cyrtolabulus yunnanensis is described. Type specimens are deposited in the Institute of zoology, Academia Sinica.Cyrtolabulus yunnanensis, sp. nov.Closely allied to Cyrtolabulus humbertianus(Saussure), but clypeus black with a yellow band in the base. Outer side of fore and mid tibiae yellow.