Abstract
The incidence and distribution of infective larvae of W. bancrofti in laboratory-bred C. fatigans was determined. Other mosquitoes fed initially at the same time were given a second feed and dissected immediately after. It was seen that the number of infective larvae from all parts of these mosquitoes was much reduced. It is suggested that in filarial epidemiological work, the incidence of infective mosquitoes should be based on the number of mosquitoes containing infective larvae, and not only those with larvae in the proboscis.