(VII) 



ILLUSTRATIONS. 



The illustrations which appear in the following pages 

 are 185 in number. They are produced from blocks in the 

 possession of this Department which have been obtained 

 from the sources indicated below. 



Through the courtesy of the United States Department 

 of Agriculture it has been possible to obtain duplicates of 

 electrotype blocks which have been used previously to illus- 

 trate the publications of that Department. 



Blocks from this source are represented by figures 1, 4, 

 5, 8, 9, 10, 13, 10, 17, 18, 21, 28, 29, 30, 31, 34, 35, 36, 37, 39, 

 48, 49, 50, 51, 53, 54, 57, 58, 59, 62, 76, 77, 81, 87, 88, 92, 93, 

 94, 99, 100, 101, 103, 104, 105, 115, 131, 132, 133, 135, 16, 



137, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 

 151, 152, 153, 154, 157, 158, 159, 160, 161, 162, 163, 164, 165, 

 166, 167, 168, 176, 177, 183, and 184. 



Figures 45 arid 47 are from blocks procured through 

 the courtesy of the Secretary of the New York Entomo- 

 logical Society. 



The blocks for figures 170, 171, 172, 173 and 175 have 

 been presented to this Department by the manufacturers of 

 apparatus. 



The figures 11, 12, 14 and 174 have been redrawn, from 

 various sources which have been acknowledged in the legend 

 in each case. 



Figures 19, 22, 24, 40, 41, 52, 60, 61, 63, 64, 66, 67, 68, 69, 

 73, 74, 75, 78, 79, 82, 83, 85, 86, 90, 95, 96, 97, 106, 107, 109, 

 110, 111, 113, 114, 116, 117, 118, 119, 120, 126, 127, 128, 130, 



138, 156, 179, 180, 181 and 182 are from drawings made by 

 officers of the Department or under their direction. 



The half-tone block for figure 185 was prepared from 

 a photograph forwarded by the Superintendent of Agri- 

 culture, Grenada. 



All other half-tone blocks are from photographs taken 

 by the writer. These are all acknowledged as 'original ' 

 in the legends, even though some of them have previously 

 appeared in the publications of this Department. Those 

 which have already been published are shown at figures 25, 

 42, 43, 44, 65, 70, 91, 108, 121, 122, 123, 124, 125 and 169. 



The half-tone blocks which now appear for the first time 

 are shown at figures 2, 3, 6, 7, 15, 20, 23, 26, 27, 32, 33, 38, 

 46, 55, 56, 71, 72, 80, 84, 89, 98, 112, 129, 134, 155, and 178. 



