1916] Reducing Malaria 283 



data indicates that the Anopheles of Panama enter largely the 

 traps on the lee sides of buildings. Probably this holds true 

 elsewhere, but this fact should be determined at each new 

 locality. Doors should be on the windward side of buildings, 

 and they should be opened and closed as little as possible 

 during dusk, the period of maximum Anopheles activity. 



Houses should be well screened with 18-mesh wire screen, 

 and all cracks, holes and openings in walls or floors must be 

 stopped-up. 



Mosquitos within buildings should be caught and killed 

 daily. The best method is to use a kilHng tube such as described 

 in these Annals, p. 16, vol. VI. A satisfactory scheme is to 

 darken all windows but one, and to catch the Anopheles which 

 go to the undarkened window. The time for such collections 

 is at early dawn. 



Ancon, C. Z., June 10, 1915; 



