Eye flies in the genus Hippelates were studied over a 2-year period on the island of Bermuda. H. pusio Loew, a highly pestiferous species, comprised 90% of the total population captured with putrefied egg attractant, while H. dorsalis Loew, another pestiferous species, comprised the remaining 10%. H. convexus Loew, a non-pest species, was recovered from sweepings of plants. Activity of pest eye fly species began in June, peaked in August and September and declined in October, falling to a very low level in November. The period during which eye flies were most active and troublesome coincided with peak periods of tourism in Bermuda. It is suggested that control measures need only be applied during the months of July-September inclusive.