Abstract: Three new species of the ant genus Pheidologeton Mayr in Guangxi,China,P.melasolenus sp.n.P.latinodus sp.n.and P.trechideros sp.n.,are described.A key based on large major worker caste is given to the known species of Guangxi.The holotypes are deposited in the Institute of Zoology,Shaanxi Normal University,the paratypes and other specimens are deposited in the Department of Biology,Guangxi Normal University.The measurements and indices used in the paper are as defined by Holldobler and Wilson (1990).All measurements are expressed in millimeters,and indices are expressed in percentage.