ABSTRACT. A survey of the stonef1y (Plecoptera) fauna of streams of the Almas River basin, Pirenópolis, Goiás State, Central Brazil, is presented as well as data of some factors that could affeet the temporal distribution of the adults. For checking adult phenology, light sources were used in three stations from June 1993 to Jully 1994. The sampled individuais were identified to species or morphospecies, as possible. ln this study , 30 I individuais belonging to the perlid genera Anacroneuria Klapálek, 1909, Kempnyia Klapálek, 1916 and Macrogynoplax Enderlein, 1909 were co llected. Adults of most species were eollected along lhe studied period, exeept for those of Kempnyia that were restricted to the warm-rainy season, the sarne pattem for this genus in southeastem Brazil. Although adults of most species were eolleeted along most of the studied period, the largest number of adults was eolleeted in the months with larger mean temperatures, showing a clear seasonality in abundanee.