VI 



Preface 



thor has endeavoured to present this matter in terms 

 intelligible to the average reader, omitting technical 

 expressions, as far as possible, and explaining them 

 fully where their use becomes necessary. 



The illustrations are chiefly from original draw- 

 ings by the author, made for Dr. Dupree : a few 

 exceptions are noted in their proper place. The 

 drawings of the larval mouth parts are from cast 

 skins, the dissections being also by the author. 

 Particular care has been taken in the mapping of 

 the larval hairs, as much use is here made of these in 

 identification. 



I here take pleasure in expressing, both in my own 

 name and that of Dr. Dupree, my appreciation of. 

 the kindness of all those who have in any way aided 

 me to bring out this work. Especially do I wish to 

 thank Dr. John B. Smith, State Entomologist of 

 New Jersey, and Dr. E. P. Felt, State Entomologist 

 of New York, for permission to revise my tables from 

 their very comprehensive collections of mosquitoes, 

 for valuable criticism and suggestions, and for the 

 loan of photographs. Also I may here properly 

 extend my thanks to Mr. D. W. Coquillett, of 

 the United States Department of Agriculture, for 

 many helpful hints and bits of information given me 

 at the time when I was engaged in preparing my 

 thesis ; and to Professor H. A. Morgan, State Ento- 

 mologist of Tennessee, for timely advice in regard 

 to my manuscript. 



E. G. M. 



Washington, D. C, 1907. 



