Two new species of Prionocyphon Redtenbacher from Taiwan (Coleoptera: Scirtidae), with notes on Prionocyphon, Mescirtes Motschulsky and Prionoscirtes Champion from East and Southeast Asia

Prionocyphon costipennis sp. nov. and P. macrodascilloides sp. nov. are described from North Taiwan. Orientoprionocyphon Klausnitzer is a new synonym of Mescirtes Motschulsky. Prionocyphon herthae Klausnitzer, Prionocyphon laosensis Yoshitomi et Satô, Prionocyphon rutai Klausnitzer, Prionocyphon ruthsteuerae Klausnitzer, Prionocyphon weigeli Klausnitzer, and Prionocyphon yoshitomii Klausnitzer are transferred to Mescirtes. Prionocyphon picigrandis is a new substitute name for Cyphon grande Pic (nec Cyphon grandis Tournier). Prionocyphon minusculus Klausnitzer is transferred to Mescirtes. Prionocyphon ovalis Kiesenwetter is reported from China for the first time. A key to the genera of Scirtidae with modified antennae, and a key to the East and Southeast Asian species of Prionocyphon are included. A catalogue of Mescirtes, Prionocyphon and Prionoscirtes inhabiting East and Southeast Asia is presented.