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Fruit flies (Bactrocera spp.) are important pests of horticultural crops, especially fruit, and vegetables. To control this pest, information about species of fruit flies in certain fruits in an area need to be identified and reported. The purpose of this study was to identify species of fruit flies, determine the dominant species of fruit flies, and diversity index of fruit flies on mango Gedong Gincu, Cengkir, and Arumanis at Kecamatan Talun, Kabupaten Cirebon. Observation method was applied by taking samples of mango attacked by fruit flies. Samples were obtained from field, wholesaler and market at Kecamatan Talun, Kabupaten Cirebon. The results showed that there were four species that attack mango Gedong Gincu, Cengkir, and Arumanis at Kecamatan Talun, Kabupaten Cirebon, namely B. dorsalis, B. carambolae, interspesific hybrids of B. dorsalis and B. carambolae, and B. albistrigata. The dominant species was B. dorsalis. Diversity index (H-) of fruit flies species were 0.05 ≤ H- ≤ 0.48 (H-= < 1.5), so that the diversity was low.