Summary
The biting activity of Anopheles darlingi was studied for over a year in an endemic area of malaria — BR-174 (Manaus/Boa Vista). The biting activity was documented to show seasonal changes in population and variation in the cycle with changes of season. Data is presented for the outdoor biting cycle and indoor biting cycle collections. Patterns remained constant within the study area and the population of A. darlingi increases in dry season. Intense rainfall is accredited the decline in population — this decline corresponds to a similar seasonal decrease in the nunber of malaria cases.