Abstract: In this present paper,the NOR localization in the representative species of 10 genera belonging to 3 subfamilies have been studied by Ag-staining method.The results show that the NOR localization are different among these genera,and same location in the same genus.For example,in Oxya,the five species studied,all of them show the NOR location on L2 and M8 chromosomes,and genus Gesonula,the location is S9 chromosome;Genus Caryanda the NOR localises on L2 chromosome,etc.From the results above,we considered that the NOR localization is paralleli with the evolutionary rate of genus category in Catantopidae.When make sure some species belonging to a certain genus,the NOR localization should be a useful cytological mark.