PREFATORY NOTE 

 TO SECOND EDITION, REVISED 



IN this new and revised edition of American Insects a detailed analytical 

 table of contents has been substituted for the simple list of chapter titles 

 used in the first edition, and an additional chapter (Chapter XIX) on the 

 subject of insect behavior and psychology has been added. While descrip- 

 tive accounts of the reflexes and instincts of insects are to be found on 

 almost every page of the book insect instinct is indeed one of the primary 

 subjects of the book the author has believed that a special discussion and 

 attempt at analysis of the springs and control of insect behavior would be 

 of interest to the reader. This special though necessarily all too condensed 

 and brief treatment of the subject has therefore been introduced into the 

 present edition. V. L. K. 



STANFORD UNIVERSITY, 

 March 26, 1908. 



