During two trips to investigate the, Passalidae (Coleoptera)fauna of) Maracá Island, on the. Uraricoera riven., Roraima, Brazil, five species were faund. During the first trip, which took place, in the rainy season (May 3-13, 1987), faun. species were faund: Passalus glaberrimus Eschsch., 1819; Passalus Interruptus (Lin., 1758); Passalus interstitialis Eschsch., 1819 and Verres furcilabris [Eschsch., 1819). Paxillus sp., as well as the. faur, species, were. faund on the second trip, during the dry season (november 23 - 30, 1987). Bionomical data collected on these species are presented and discussed.