The thorax is composed of three basic segments of which the second (mesothorax is the largest. The mesonotum is the dorsal part of the mesothorax and it constitutes most of the dorsal part of the thorax. It is composed of the prescutum (not differentiated in most Diptera, except for some Nematocera), the scutum and the scutellum.
Anyone has "Chironomidae of the Holarctic region. Keys and diagnoses. Part 3. Adult Males Entomologica Scandinavica Supplement 34"?
smolwaarneming@gma il.com
Does someone has a scan of Nartshuk E.P. 2003. Key to families of Diptera (Insecta) of the fauna of Russian and adjacent countries. Proceedings of the Zoological Institute Vol. 294: 1-252 for me?