Abstract: Most members of cybocephalid beetles are predators which feed on the armored scales on fruit and forest trees. 8 species of Cybocephalus Erichson ( Cybocephalus nipponicus Endrdy Younga 1971, C. Pangi Yu et Tian 1995, C. dissectus Yu 1994, C. concavus Yu et Tian 1995, C. explansus Yu 1994, C. chinensis Yu 1995, C. mashanus Yu 1994 and C. guilinensis Yu 1995) collected from Hainan Island, China, were described and illustrated in this paper.