Abstract
Nine new species of the genus Tetraserica from Thailand are described. They are Tetraserica matsumotoi sp. nov., T. latefemorata sp. nov., T. takahashii sp. nov., T. doisangensis sp. nov., T. midoriae sp. nov., T. masumotoi sp. nov., T. wiangpapaoana sp. nov., T. chiangdaoensis sp. nov. and T. angkhangensis sp. nov.