AN 



INTRODUCTION 



TO 



ENTOMOLOGY 



BY 



JOHN HENRY COMSTOCK 



PROFESSOR OF ENTOMOLOGY AND GENERAL INVERTEBRATE 

 ZOOLOGY, EMERITUS, IN CORNELL UNIVERSITY 



SECOND EDITION, ENTIRELY REWRITTEN 



ITHACA, N. Y. 



T E COMSTOCK PUBLISHING CO. 

 1920 



