120 



CHAPTER VI. 

 Insects Which Attack Man. 



MOSQUITOES. Diptera. 



Residents and visitors in the tropics are probably 

 familiar with mosquitoes. These insects have for many 

 years been known from the great annoyance which they 

 cause by their habits of feeding. It is only in comparatively 

 recent years, however, that the extreme importance of these 

 small insects as carriers of disease has been recognized. 

 Malaria, filaria, and yellow fever are all known to be 



- I 35- Yellow fever mosquito. 

 Enlarged. (From U. S. Dept. Agric.) 



