ACKNOWLEDGMENT. 



To P. Blakiston's Sons & Co., Philadelphia, we are indebted for the 

 use of the cuts numbered below, which appeared in the excellent work 

 by Professor J. W. Folsom, entitled "Entomology, with Special Refer- 

 ence to its Biological and Economic Aspects": Cuts numbered Fig. 1, 

 2, 3, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 

 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 38, 41, 56, 57, 59, 60, 68, 80, 

 84, 87, 110. 



