Influence of Prevailing Wind Direction 

 and its relation to Anopheles entering houses. 



C- Anopheles collect on screen 

 and enter if door is left 

 open long enoug^h. 



p^ 



■r ft 



A Door in are-entrant 

 angle facilitates entrance 

 of mosquitoes. 

 They enter when the door 

 is opened. 



The.door of screened porch ( B.) is better located than that at (F ) . 



ttttAnopheleB 



Diagrams showing best locations for screen doors 



88 



