PROPHYLAXIS OP MALARIA. 
71 
to entirely eradicate mosquitoes, this method would be easy of appli¬ 
cation and would undoubtedly give good results in reducing the 
number of mosquitoes and the incidence of malaria. In temperate 
regions it is generally possible to rid our posts of mosquitoes by one 
or more of the other methods described in this chapter, but in the 
Tropics it is very often impossible to do more than reduce the num¬ 
ber of these insects, and this would appear to be a great aid in that 
direction, and possesses the additional value that it enables us to 
capture and kill the mosquitoes that have bitten man and may, there¬ 
fore, have become infected with malaria. 
