New alien phytophagous insect species to the fauna of Slovenia.
Five alien insects new to the fauna of Slovenia are recorded: Prociphilus (Meliarhizophagus) fraxinifolii (Riley 1879) [Hemiptera: Aphididae], Cacopsylla fulguralis (Kuwayama 1908) [Hemiptera: Psyllidae], Epitrix hirtipennis (Melsheimer 1847) [Coleoptera: Chrysomelidae], Euxesta notata (Wiedemann 1830) and E. pechumani Curran 1938 [Diptera: Ulidiidae]. Diagnostic characteristics, bionomics, trophic features, distribution and potential economic as well as environmental threats of each species are briefly discussed. Each species is also photographically documented. A key for the identification of the alien Euxesta-species occurring in Europe is provided.