CHAPTER VII 



FLIGHT AND ATTRACTION OF MOSQUITOES 



THE various species of mosquitoes have not 

 the same habits. The differences of time 

 of biting, of selection of propagation areas, quality 

 of water in which larvae are found, etc., are well 

 known. Every night at certain periods of the year, 

 hundreds of Culices are found dead in the globes of 

 electric arc lights. Anopheles on the contrary are 

 practically never found in the globes and wiU not 

 fly close to a bright light. Apparently only a few 

 species of one genus of mosquito are attracted by 

 light sufficiently to be destroyed by the flame, 

 while the Isthmian Anopheles and possibly others 

 find a strong light repulsive. It is possible that 

 some Anopheles associate lights with man. 



The general direction of the wind at Panama is 

 from north to south and it blows from south to 

 north on but few days in the year. Many years of 

 careful observation on the Pacific slope of the 

 Isthmus gave fairly conclusive evidence of a marked 



94 



