II TABLE OF CONTENTS. 



THE COTTON-WORM IN OTHER COUNTRIES ... 71 



Confined to the Western Hemisphere, 71 ; insects affecting the crop in East- 

 ern Hemisphere, 71 ; extent of injuries in West Indies, 71 ; in Mexico, 72; 

 in British Guiana, 72 ; in Dutch Guiana 73 ; in Brazil, 74. 



CHAPTER III. 

 HABITS AND NATURAL HISTORY 75 



The egg, 75 ; larva, 76 ; habits of young larva, 76 ; number of molts, 78 ; jump- 

 ing of larvae, 79 ; marching, 79 ; odor of infested cotton-fields, 79 ; belief 

 that larvae will only eat cotton of a certain maturity, 80; other foot! of 

 larva? than leaves, 80 ; time required for the development of larva, 80 ; ex- 

 tent of ravages, 81 ; other food plants, 81 ; preparation for pupation, 82 ; 

 description of full-grown larva, 82 ; variation in coloration, 83 ; pupa, 83 ; 

 adult, 83 ; food of adult, 84 ; nectar of extra floral glands, 84 ; fruits, 86 ; 

 power of piercing the rinds of fruits, 86; position of moth while at rest, 

 88; age of moth at oviposition, 88 ; number of eggs laid by a single moth, 

 88; duration in adult state, 83; number of broods, 88; powers of flight, 

 89; northern occurrence of Aletia, 89; description of adult, 90 ; the "three 

 crops of worms," 90 ; disappearance of third crop, 91 ; disappearance of 

 last brood, 92 ; first appearance of the worms in spring, 97 ; hibernation, 

 99; journal of Mr. Schwarz's search for hibernating cotton-moths, 102; 

 Mr. Affleck on hibernation, 106; Mr. Humphreys, 106 ; conclusions, 108. 



CHAPTER IV. 

 THE THEORY OF MIGRATIONS OP THE MOTH 109 



Proposed by Thomas Affleck, 109 ; Dr. Gorham's statement of the theory, 

 109; Dr. Burnett's paper, 113 ; Mr. Grote's paper, 115; examination of the 

 data advanced by the theorists, 118; conclusions, 121 ; influence of winds 

 on immigration of mothsy 121. 



CHAPTER V. 



INFLUENCE OF WEATHER 133 



Is a mild or severe winter the more liable to be followed by a bad worm 

 year ! 133 ; is wet or dry weather the more favorable to the increase of the 

 worms T general opinion, 134 ; former methods of accounting for facts, 134 ; 

 Mr. Davis's communication on his ant-theory, 134 ; testimony of others, 

 136; conclusions, 137. 



CHAPTER VI. 



NATURAL ENEMIES OF THE COTTON-WORM 138 



(a) VERTEBRATE ENEMIES 138 



Hogs, 138; dogs, 138; cats, 138; raccoons, 138; opossums, 138; bats, 

 108; importance of birds, 139; negative evidence, 139; domestic fowls, 

 139; testimony of authors, 139; testimony of correspondents, 140; con- 

 cerning wild birds, 141 ; list of birds observed to eat the cotton-worm, 

 141; the English-sparrow question, 142; need of carefully looking 

 upon both sides of the questions, 143; letter from Prof. F. H. King, 

 143 ; experience in Georgia, 143 ; the discussion of the Nuttal Club, 

 144 ; Dr. Hageu's letter, 150 ; the opinion of Dr. Elliot Coues, 152 ; 

 letter of Dr. T. M. Brewer, 156; letter of John Galvin, 156; general 

 ftdvice on the subject, 158 ; list of insectivorous birds occurring in the 

 cotton belt, 159. 



(6) INVERTEBRATE ENEMIES 162 



Prcdaccous : Use of the terms predaceous and parasitic, 162; spiders, 

 162 ; aphis lions, 164 ; musquito hawks, 164 ; rear-horses, 165 ; the 

 spined soldier bug, 166; the green soldier bug, 167 ; the thick-thighed 



