In the tribe Macrosiphini (Hemiptera: Aphididae), we discovered two new records in Korea, Capitophorus formosartemisae (Takahashi, 1921) and Hyperomyzus lactucae (Linnaeus, 1758) collected on Artemisia princeps and Sonchus oleraceus, respectively. They are illustrated and described, based on the macerated slide specimens of the apterous viviparous females.