INTRODUCTION vii 



seemed to him to be no more reason for enduring the 

 mosquito scourge than in allowing small-pox to ravage 

 communities, as it used to do before the days of Jenner. 

 Work against mosquitoes is being undertaken everywhere, 

 by individuals and by communities. The interest in the 

 subject, from both medical and lay points of view, has be- 

 come so great that persons are not satisfied with half 

 knowledge, but must know the whole mosquito story, and 

 it has been with the purpose of supplying in some part 

 this demand for information, that this book has been pre- 

 pared. It tells what is known about mosquitoes from the 

 biological point of view, from the medical point of view, 

 and from the practical side. An especial effort has been 

 made to show, in a straightforward way, to physicians how 

 the different kinds of mosquitoes can be distinguished, 

 and to indicate the characteristic habits and breeding- 

 places of those forms which spread malaria and yellow 

 fever. Directions are given for collecting mosquitoes and 

 for rearing their early stages, and an especial effort has 

 been made to display fully and practically the remedial 

 measures which should be adopted in mosquito-ridden 

 neighborhoods. 



