this paper records some diptera from the island of fernando de noronha (pernambuco, brazil), presenting the richness of species and their abundance. the material studied was collected in july 1973. eight families of diptera in a total of 11,515 specimens were studied. among the families the following seven are new records: calliphoridae, muscidae, fanniidae, stratiomyidae, sepsidae, otitidae and tabanidae. the first three and the sarcophagidae (previously recorded) were identified to species level. the most abundant families were sepsidae and calliphoridae with more than 80% of the total collected, having cochliomyia macellaria (fabricius, 1775), as the dominant species.