Three new species belonging to the genus Aphis Linnaeus (Hemiptera, Aphididae, Aphidinae) are described from apterous and alate viviparous females collected on species of Junellia, Lippia and Mulguraea (Verbenaceae) in localities of Argentina; they respectively are: Aphis junelliae González Rodríguez & Nieto Nafría sp. n., Aphis lippiae Ortego & Nieto Nafría sp. n., Aphis mulguraeae Nieto Nafría & Mier Durante sp. n. Features that distinguish the new species between them and from other species of Aphis known in South America are exposed.
