Aphid species and morphs new to the fauna of Finland (Homoptera, Aphididae, Macrosiphini)

Collecting data are represented on 26 species and subspecies new to Finland and some morphs are described for the first time. Comments on some species are given and new characters of diagnostic value are described for several species. Acyrthosiphon aurlandicum Heikinheimo, 1966 is a junior synonym of A. brachysiphon Hille Ris Lambers, 1952. A new subgenus, Metobion, with typus subgen. Acyrthosiphon (Metopolophium) graminearum Mordvilko, 1919, is erected in the genus Sitobion Mordvilko, 1914