SummaryStudies were conducted in 100 privies in the Savannah, Georgia, area from December, 1952, to December, 1953, to determine the species composition of the fly populations produced from this source. More than 175,000 Diptera were collected representing 97 species, 65 genera, and 33 families. Patterns of emergence for individual species of Diptera varied seasonably, with Hydrotaea houghii most prevalent in December, Fannia canicularis in January, Psychodidae in February, Dendrophaonia scabra in March and April, Psychoda alternata in May, Ophyra leucostoma in June, Telmatoscopus albipunctatus in August, September, and October, Leptocera venalicia in November, and Hydrotaea houghii again in December. Musca domestica was not an important species at any time, its maximum prevalence being 6 per cent of the total fly emergence during January. No significant variations in the species of flies emerging from the urban, suburban, or rural privies was noted.