Sitobion wikstroemiae, also known as Sitobion (Sitobion) wikstroemiae, is an aphid in the superfamily Aphidoidea in the order Hemiptera. It is a true bug and sucks sap from plants.
References
http://aphid.speciesfile.org/Common/basic/Taxa.aspx?TaxonNameID=1168871 https://animaldiversity.org/accounts/Sitobion_wikstroemiae/classification/