4 PREFACE. 



season of an insect's appearance or disappearance. The older and more 

 familiar generic names are generally employed, and the names in brackets 

 indicate the genera to which the insect is referred in more modern systems. 

 Figures 35, 45, 46, 47 and 49 have been kindly loaned by Mr. Charles 

 L. Flint, Secretary of the Massachusetts State Board of Agriculture; 51 by 

 Dr. A. S. Packard, Jr., of Salem, Mass., and 52, 53 and 54 purchased of the 

 same : the rest are original. 



My office is still at Eoom 29, Insurance Building, Southeast corner of 

 Fifth and Olive streets, St. Louis ; and all letters sent to me should be thus 

 addressed. 



I thankfully acknowledge the receipt of free passes over the following 

 railroads: St. Louis and Iron Mountain, Missouri Pacific, Atlantic and 

 Pacific, Hannibal and St. JosejDh, North Missouri, Chicago and St. Louis^ 

 Illinois Central, and Eockford, Eock Island and St. Louis. 



Eespectfully yours, 



CHAELES V. EILEY, 



State Entomologist. 

 St. Louis, Mo., December 2, 1871. 



