SOUKCES OF ILLUSTRATIONS. 



Electrotypes of the following figures were purchased, 

 being secured through the tindness of the parties named : 

 Fig. 9, from Houghton, Mifflin & Co. ; Fig. 102, from the 

 Iowa Ag. Exp. Sta., through Prof. H. E. Summers; Figs. 

 7, 136, and 137, from Dr. J. B. Smith; Figs. 51, 52, 60, 

 84, and 85, from Cornell Tniv. Ag. Exp. Sta., through 

 Prof. M. Y. Slingerland: Figs. 25 and 28, from The 

 Farmers' Keview, Chicago; Figs. 74, 75, 76, 77, and 78, 

 from Dr. S. A. Forbes; Figs. 71 and 72, from The 

 Country Gentleman, for which they were originally 

 redrawn by the author; Fig. 53, from the Xebr. Agr. Exp. 

 Sta., through Prof. L. Bruner; and Figs. 11, 24, 31, 50, 

 59, 61, 62,^64, 66, 67, 68, 79, 80, 81, 82, 83, 88, 89, 90, 

 91, 92, 93, 94, 97, 104, 105, 106, 107, 108, 109, 111, 112, 

 113, 114, 116, 117, 118, 119, 120, 121, 122, 123, 124, 

 126, 127, 128, 129, 131, 134, 135, 136, 143, 146, 154, 

 155, 156, 157, 158, 159, 160, 161, 162, from the United 

 States Department of Agriculture, through the kindness 

 of Dr. L. 0. Howard and Mr. F. H. Chittenden, of the 

 Division of Entomology and the Division of Publications, 

 to which gentlemen we are under especial obligation. 



The following figures were kindly loaned by the parties 

 named: Figs. 29, 30, 32, 33, 34, 35, 36, 37, 38, 39, 40, 



vii 



