"Speight, M.C.D. 2015. Species accounts of European Syrphidae (Diptera), 2015. Syrph the Net, the database of European Syrphidae, 83: 295 pp., Syrph the Net publications, Dublin." . . . . "Speight (2015)" . "2015"^^ . "Speight (2015)" . "2015"^^ .