Fissocantharis Pic, 1921 is one of the most diverse cantharid genera in Taiwan, with 23 species and one subspecies. Recently, Cephalomalthinus Pic, 1921 has been recovered as the senior synonym of Fissocantharis. Therefore, in order to clearly cite the total number of species in future works, an updated checklist of Cephalomalthinus soldier beetles of Taiwan, including Chinese names is provided.
Cyrtotrachelus thompsoni Alonso-Zarazaga & Lyal, 1999 is a common species widely distributed in Asia, including China, Japan and Taiwan from East Asia; India and Pakistan from South Asia. In this study, we provided the first report of the pronotum phenotype difference of C. thompsoni between Matsu islands and Taiwan island. The photograph of habitus, illustration of male genitalia and key to Palearctic species of Cyrtotrachelus are also provided.