INTRODUCTION. 



11 



1 take this opportunity to express my thanks to the officers of 

 the great railroad lines throughout the State— the Illinois Central ; 

 the Chicago, Alton and St. Louis ; the Chicago and Rock Island ; 

 the Chicago, Qaincy and Burlington ; and the Chicago and North- 

 western railroads— for the annual passes over their respective 

 routes, which they have freely presented to me. 



All which is respectfully submitted, by 



WILLIAM LeBAEON, 



Geneva, Deo. 15. ^^t(hte Entomologist. 



