viii SOURCES OF ILLUSTRATIONS 



78, 79, 80, 98, 99, 107, 147, 152, 212, 213, 214, 215, 220, 243, 

 259, 260, 261, 320, 473. 



Dr. S. A. Forbes, State Entomologist of Illinois, Urbana, 111., 

 kindly furnished the following: Figs. 50, 51, 56, 58, 120, 121, 122, 

 123, 151, 156, 157, 234, 299. 



Prof. G. W. Herrick of the Cornell University Agricultural 

 Experiment Station furnished electrotypes and photographs of 

 the following illustrations by Dr. Slingerland: Figs. 57, 84, 87, 

 249, 250, 251, 253, 254, 338, 344, 345, 346, 347, 348, 360, 361, 

 362, 363, 364, 373, 381, 382, 383, 384, 422, 437, 482, 483, 485, 

 486, 495, 498, 499, 500, 501, 513. 



Prof. F. L. Washburn, State Entomologist of Minnesota, 

 kindly furnished the following and also some of the figures of 

 Dr. Riley listed above: 81, 330, 343, 350, 351, 378, 380, 491. 



Prof. H. A. Gossard of the Ohio Agricultural Experiment 

 Station furnished the following: 89, 108, 341, 342. 



Prof. R. H. Pettit, Entomologist of the Michigan Agricultural 

 Experiment Station, furnished . the following: 92, 100, 245, 

 and 341. 



Prof. C. P. Gillette, Director of the Colorado Agricultural 

 Experiment Station, supplied figures 229, 239, 352, 439, 450, 

 506, 507, and 511. 



Dr. J. B. Smith, Entomologist of the New Jersey Agricultural 

 Experiment Station, loaned the following and also some of the 

 Riley figures: 13, 20, 109, 209, 210, 303, 308, 309, 323, 324, 

 327, 334, 335, 336, and 337. 



Prof. P. J. Parrott kindly sent photographs of the following 

 from the files of the New York State Agricultural Experiment 

 Station: Figs. 340, 349, 399, 465, 466, 493, 494, 509, 510. 



Prof. W. E. Rumsey of the West Virginia Agricultural Exper- 

 iment Station kindly loaned photographs of the following: 357, 

 358, 359, 367, 368, 369, 370, 385, 386, 387, 388, 389, 441, 444. 



Prof. H. Garman of the Kentucky Agricultural Experiment 

 Station furnished Figs. 97, 165, 166, and 238. 



Director R. W. Thatcher of the Washington Agricultural 

 Experiment Station furnished Figs. 237, 328, 329, and 339. 



