Review of Campsicnemus species from the Atlantic Ocean Islands (Diptera: Dolichopodidae)

New species Campsicnemus flavissimus sp. nov., C. meridionalis sp. nov., and C. sanctae-helenae sp. nov. are described from St. Helena. A review and key to seven Campsicnemus species inhabiting Azores, Canary Is., Madeira and St. Helena are provided. A new status (as subspecies of C. armatus Zetterstedt, 1849) for C. caffer Curran, 1926 stat. nov. is proposed.