This volume treats part of Macrosphini (Aphididae: Aphidinae), with keys to all genera occuring in Scandinavia or expected to be found there in the future and descriptions of some of them, including Anuraphis, Brevicoryne, Coloradoa and Cavariella; Myzus, Nasonovia, Capitophorus and Macrosiphum will be treated in the fifth volume, Uroleucon and Megoura in the sixth volume together with Lachnidae. It includes several drawings, taxonomical and biological notes and notes to distribution.