Genus Dacus Fabricius

Dacus Fabricius, 1805: 272 . (in Drew, 1989: 16). Type species: Dacus armatus Fabricius, 1805, by subsequent designation of Speiser, 1924: 140 and confirmed by Hendel (1927: 25).

Diagnosis. Abdomen elongate-oval or petiolate, abdominal tergites fused. Scutum with or without lateral and medial postsutural vittae, chaetotaxy reduced compared to Bactrocera and Zeugodacus Hendel; scutellum short and broad. Posterior margin of sternite V of male with shallow to moderate concavity (emargination). Male genitalia with epandrium and surstyli distinctly bulb-shaped (posterior view); posterior lobe of surstylus 2̄3 times longer than anterior lobe except in D. longicornis . Glans of phallus with single tubular acrophallus, praeputium fully patterned, predominantly hexagonal pattern except elongate pattern in D. persicus . Aculeus tip with three pairs of preapical setae. It is similar to Bactrocera and Zeugodacus in general appearance but can be easily separated by the presence of fused abdominal tergites. Subgenus Sinodacus Zia of genus Zeugodacus and subgenera Semicallantra Drew and Tetradacus Miyake of Bactrocera possess petiolate abdomen as in Dacus but can be differentiated by free abdominal tergites.