EN
Gonioctena tredecimmaculata (Jacoby, 1888) is redescribed and two new species, G. ohmomoi sp. nov. and G. riyuetanensis sp. nov., are described from Taiwan. Gonioctena tredecimmaculata var. taiwanensis (Achard, 1924) is removed from synonymy with G. tredecimmaculata and raised to the species level. The larva of G. tredecimmaculata is described in detail and compared with that of G. taiwanensis.