ACKNOWLEDGMENTS. 



The illustrations in this book are derived as follows : Electro- 

 types were loaned for the purposes of the work by the Agricul- 

 tural College Experiment Station of New Jersey, of figures Nos. 

 4, 5, 6, 7, II, 13, 14, 15, 28, 29, 30, 32, 34, 35, 36, 37, 38, 39, 

 41, 43, 44, 45, 50, 53, 64, 72, 83, 84, 85, 88, 89, 95, 99, 103, 104, 

 105, 114, 127, 128, 129, 130, 131, 132, 133, 134, 136, 137, 138, 

 142, 143, 144, 146, 147, 149, 157, 158, 160, 161, 162, 164, 166, 

 167, 170, 171, 172, 173, 174, 175, 176, 178, 179, 180, 181, 182, 

 183, 188, 189, 190. 192, 194, 195, 200, 201, 202, 204, 206, 212, 

 214, 216, 217, 218, 219, 221, 222, 225, 227, 228, 229, 230, 231, 

 232, 233, 234, 236, 238, 239, 241, 242, 243, 246, 247, 255, 263, 

 264, 265, 274, 278, 279, 281, 283, 286, 287, 288, 289, 290, 291, 

 296, 297, 298, 299, 300, 307, 314, 321, 332, 333, 334, 341, 342, 

 343. 349> 350, 351. 352, 357. 362, 366, 368, 369, 375, 377, 380, 

 386, 387, 392, 393, 394, 395, 396, 397, 39S, 399, 401, 409, 410, 

 411, 412, 413, 416, 417, 418, 419, 424, 425, 426, 430, 432, 434, 

 435. 437. 438, 440. 441. 444. 445. 446, 447. 448, 449, 450, 454, 

 455. 457. 458, 459. 460, 461, 462, 463, 464, 465, 466, 467, 468, 

 469. 471, 473, 474. 



By the courtesy of the Secretary of Agriculture and of the 

 Division of Illustrations in the United States Department of Ag- 

 riculture, electrotypes were obtained for figures Nos. 22, 23, 48, 

 56, 58, 73. 74. 75. 76, 81, 82, 86, 87, 90, 91, 92, 93, 100, loi, 

 112, 116, 117, 118, 120, 121, 122, 124, 148, 151, 152, 168, 193, 

 198, 209, 223, 224, 226, 244, 245, 292, 293, 294, 295, 315, 316, 

 318, 339, 340, 358, 360, 363, 364, 365, 371, 374, 376, 383, 389, 

 390, 391. 402, 404, 405, 406, 407, 408, 431, 452, 475. 



The J. B. Lippincott Company kindly loaned the following 

 from Saunders's " Insects Injurious to Fruits" : Nos. 55, 59, 60, 

 61a, 65, 79, 80, 94, 97, 98, 102, 109, 125, 159, 165, 169, 191, 

 197, 199, 203, 211, 213, 220, 240, 254, 259, 270, 271, 275, 276, 



