XIV INTRODUCTION 



this modern science. Dr. T. W. Harris (i 759-1856) in Massachusetts, 

 Dr. Asa Fitch (1809-1879) in New York, Townend Glover at Washing- 

 ton, B. D. Walsh (1808-1869), Dr. C. V. Riley (1843-1895) in Missouri 

 and at Washington, Dr. W. Le Baron and Cyrus Thomas in Illinois, 



and Dr. W. Saunders (1835-1914), Dr. C. J. S. Bethune (1838 ) and 



Dr. James Fletcher (1852-1908) in Canada stand out prominently on 

 account of the excellent investigations of the life-histories of injurious 

 insects and their careful determination of effective methods of control. 

 {See frontispiece.) 



