Two new species of the tribe Colomerini from China are described and illustrated. These species are Isoannulus baishaensissp. nov. collected from Combretum indicum (L.) DeFilipps (Combretaceae), and Gammaphytoptus diaoluoshanensissp. nov. found on Bauhinia sp. (Leguminosae). All are vagrants causing no damage to the host plants.