A review of the genus Agetocera (Coleoptera: Chrysomelidae: Galerucinae) in Taiwan—are there only two species?

The Taiwanese species of Agetocera (Coleoptera: Chrysomelidae) are reviewed. Three new species, A. yuae, A. choui, and A. huatungensis are described and A. discedens Weise and A. taiwana Chûjô are redescribed. Agetocera taiwana together with the new species form a group of four sibling species. The Agetocera taiwana species group is defined and a key to Taiwanese Agetocera species is provided.