A total of 14,537 flies were collected by the fly traps laid in th pigpen and chicken coop on 28 separate occasions ever a seven-month period. The collection comprised 23％ males and 77％ females at male-to-female sex ratio of 29.5. The catches were identified and classified into 12 species: Calliphora lata Parasarcophaga similis Aldrichina grahami P. crassipalis Phaenicia and Lucilia spp. P. misera Boettcherisca peregrina Ravinia sericata Helicophagella melanura Musca domestica Parasarcophaga albiceps Muscina stabulans. Of the 12 species, six were of sanitary significance occurring in numbers exceeding 200. Arranged in the descending order in size of the catches: Phaenicia and Lucilia spp. 38% of the fetal collection (at sex ratio of 20.6), Musca domestica 37％ (25.1), Muscina stabulans 17%(59.5), Aldrichina grahami 3.3％(26.2), Boettcherisca peyegrina 3％(63.4), and Helicophagella melanura 1.5％(44.2). As to seasonal prevalence, common among the species collected, peaks appeared twice in late May and Bate September while tile least occurrences were observed in July and early August. Temperature and the length of sunlight hours, among the environuental factors, appeared closely related to the sizes of the calches. The six most frequently occurring species of sanitary significance, paragraph 3 above, were paired into three groups in terms of the similarity in their seasonal prevalence: Phaenicia and Lucilia spp. and Musca domestica, Muscina stabulance and Aldrichina grahami, and Boettcherisca peregrina and Helicophagella melanura.