Sitobion lambersi, also known as Sitobion (Sitobion) lambersi, is an aphid in the superfamily Aphidoidea in the order Hemiptera. It is a true bug and sucks sap from plants.
References
ADW: Sitobion lambersi: CLASSIFICATION species Sitobion (Sitobion) lambersi David, 1956: Aphid Species File AgroAtlas - Pests - Sitobion (Macrosiphum) avenae Fabricius - English Grain Aphid. English Grain Aphid - Oklahoma State University