The knowledge of fly species diversity and population patterns in the ecosystems is important to subsidy the choice of ecologically correct methods for control of tephritoid pests. The aim of this paper is to evaluate the diversity of tephritoids and their population patterns in a decidual and a riparian forest. Flies were caught in McPhail traps with food bait in two natural forest reserves at the Municipality of Corumbá-MS, from August 2003 to August 2004. Thirteen species belonging to five genera and two families were recorded. At Sítio Pingo de Amor (decidual forest [DF]), were collected: Anastrepha dissimilis, A. fraterculus, A. obliqua, A. rheediae, A. sororcula, A. undosa and Ceratitis capitata (Tephritidae), besides Dasiops sp.1, Dasiops sp.2, Lonchaea sp.1, Lonchaea sp.2, Neosilba sp.1 and Neosilba sp.2., from Lonchaeidae. At Canal do Tamengo (riparian forest [RF]), were recorded all species above mentioned, except: A. dissimilis, A. rheediae, A. undosa, Dasiops sp.2 and Neosilba sp.2. The Shannon-Weaver diversity index (H'), was 2.01 in the DF and 1.51 in the RF. Anastrepha obliqua was very abundant in both natural forest reserves. In the DF A. sororcula was constant and predominant and, Neosilba sp.1 was very abundant. At both environments A. obliqua, Lonchaea sp.2 and Neosilba sp.1 were very frequent and, A. obliqua and Neosilba sp.1 were dominant.
Faunistic studies; Lonchaeidae; McPhail traps; Tephritidae
