Sexually mature 9-day-old male Caribbean fruit flies,Anastrepha suspensa(Loew), attracted both female and male flies under field conditions. Male-baited sticky traps captured females and males in equal numbers while McPhail traps baited with an aqueous preparation of yeast hydrolysate attracted from 1.4–1.8 times as many females as males. The presence of released males did not reduce the recapture percentage of females, nor did the presence of females influence recapture of males. Males released in the absence of females Were as strongly attracted to males as when females were present.