The aphid genus Micromyzodium David, 1958 is newly recognized in the Korean peninsula. This genus is characterized by very long dorsal abdominal hairs, almost 3-4 times as long as basal diameter of antennal segment III. Colonies of two Micromyzodium species; Micromyzodium kuwakuse Uye 1924 and Micromyzodium nipponicum Moritsu 1949 were collected on Fatoua villosa Nakai (Urticales: Moraceae) and Perilla frutescens Britton (Lamiales: Lamiaceae), respectively. In this study, we redescribed, illustrated, and measured for apterous viviparous females of the two species.