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A taxonomic revision and redescription of the genus Eurymesosa Breuning, 1938 are presented, including a key to species. Three of the five currently accepted species are considered valid: Eurymesosa ventralis (Pascoe, 1865), Eurymesosa allapsa (Pascoe, 1866) and Eurymesosa ziranzhiyi Yamasako & Lin, 2016. Three junior synonyms are proposed for E. ventralis: Eurymesosa albostictica Breuning, 1962, syn. nov., Eurymesosa affinis Breuning, 1970, syn. nov., and Eurymesosa multinigromaculata Breuning, 1974, syn. nov. Additionally, E. allapsa (Pascoe, 1866) is resurrected from synonyms of E. ventralis. Females of E. allapsa and E. ziranzhiyi Yamasako & Lin, 2016 are described for the first time.