370 
MALARIA 
clean-cut and so tends to discard it. How¬ 
ever, sporozoite malaria should be used in 
all final tests, whether or not blood-inocula¬ 
tion malaria also is used. 
In the field of immunology we are work¬ 
ing to develop a serum and a vaccine. 
In the field of bionomics and ecology 
new studies are underway seeking to solve 
the numerous problems of the botanical, 
hydrological, and physiological interdepen¬ 
dencies which determine mosquito produc¬ 
tion. The solution of these problems may 
lead to the development of new larvicides, 
cheaper methods of distributing them and 
control of waters with the least disturbance. 
Study of the adult mosquito as to its feed¬ 
ing, flight, oviposition habits, and, most 
particularly as to its micro-habitat may 
lead to the discovery of other and simpler 
methods of preventing malaria transmis¬ 
sion. Through these investigations in the 
bionomics and ecology of anophelines we 
may well achieve the ideal of the malariol- 
ogist, biological control. 
