Anastrepha ludens(Loew) developmental time and egg clutch size were determined in grapefruit (Citrus paradisiMad.), orange (Citrus sinensisOsbeck), mango (Mangifera indicaL.), and peach (Prunus persicaL.), and the suitability of citrus was determined forA. ludensdevelopment to adulthood in the laboratory. Developmental time for immature stages ofA. ludensvaried with host fruit species. Egg incubation required 3.8, 4.3, 4.6, and 3.8 d, and larvae developed in 27.4, 29.7, 22.3, and 10.3 d in grapefruit, orange, mango, and peach, respectively. Pupae developed in 17.1, 13.7, 14.2, and 13.0 d in the fruit mentioned above, respectively. Larger egg clutches were oviposited in peach than in the other tested fruit. Suitability of citrus for development ofA. ludensimmatures varied with fruit species and varieties. ‘Marsh’ and ‘Ruby Red’ grapefruit were more suitable forA. ludensimmatures development than ‘Valencia’ orange. Peach susceptibility toA. ludensincreased as the ripening process advanced. The egg clutch size and development of immatureA. ludensare thought to be related to pulp compactness, albedo thickness in citrus, and resistance of rind to penetration.