The genus Yponomeuta Latreille belongs to the family Yponomeutidae, with over 75 described species worldwide. This genus is distributed mainly in the Palaearctic Region, comprising 42 species. In Korea, a total of 16 species have been reported from Korea. This genus is reported by Park (1983), with seven species in Illustrated Flora & Fauna of Korea Vol. 27. Bae & Byun (2003) reported four newly recorded species of this genus: Yponomeuta kanaiella, Y. montanatus, Y. sociatus, and Y. yanagawanus. Byun (2009) listed a Korean Micro-Lepidoptera, recording 12 Yponomeuta species, with a newly recorded species Y. solitariellus. Sohn et al. (2010) and Lee & Park (2016) added two species: Y. anatolicus and Y. cinefacta. In the present study, we reported three newly recorded species of Yponomeuta, including adults and genital photographs, host plants, distribution and short descriptions.

Twelve species of the genus Yponomeuta Latreille belonging to the family Yponomeutidae in Korea are recognized. Among them, four species, Yponomeuta kanaiellus Matsumura, Y. montanatus Moriuti, Y. sociatus Moriuti, and Y. yanagawanus Matsumura, are reported for the first time from Korea. Adults and genitalia of newly recorded species are illustrated. General biology with host plant records is reviewed for each species. A key to all known species in Korea, based on the external characters, is provided.