A checklist of Corsica's lotic Chironomidae is given. Collections of pupal exuviae from 32 river sites (July 1995, May 1999) yielded a total of 147 species-level taxa including several previously unknown pupal exuviae. Three of them are figured ? Hayesomyia Pe nov., Eukiefferiella Pe nov., Thienemanniella Pe nov. These unusual forms may possibly be endemic species to Corsica that are new to science. Most of the chironomid species recorded are western Palaearctic. 11 species are circum-mediterranean.