CONTENTS OF VOL. I. 



PAET I. 



CHAPTER I. 

 INTRODUCTORY. 



PAGE 



Number and size of species . . . . .1 



Importance to man . . . . .1 



Parasitism and mutualism . . . .4 



Distribution . . . . . .4 



General characters . . . . .5 



CHAPTER II. 



THE HISTORY OP LITERATURE RELATIVE TO THE TYRO- 



GLYPHID^EJ . . . . . .9 



CHAPTER III. 



CLASSIFICATIONS OP THE ACARINA SINCE 1888. 



Canestrini's . . . . . .26 



Trouessart's . . . . . .29 



Banks' . . . . . . .34 



CHAPTER IV. 



CLASSIFICATIONS OP THE TYROGLYPHID^:. 



Koch's . . . . . . .36 



Canestrini and Fanzago's . . . .37 



Megnin's . . . . . .38 



Canestrini's 39 



