BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 35 
77. Comstock, J. H.—Continued. 
Chapter III: 
Habits and. natural history. 75 
The egg, 75; larva, 76; habits of young larva, 76; number of molts, 
78; jumping of larvae, 79; marching, 79; odor of infested cotton- 
tields, 79; belief that larvm will only eat cotton of a certain 
maturity, 80; other food of larv® than leaves, 80; time required 
for the development of larvae, 80; extent 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, 88; number of 
broods, 88; powers of flight, 89; northern occurrence of Ahtia, 
89; description of adult, 90; the three crops of worms, 90: disap¬ 
pearance 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; con¬ 
clusions, 108. 
CnAPTER IV: 
The theory of migrations of 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; exam¬ 
ination of the data advanced by the theorists, 118; conclusions, 121; 
influence of winds on immigration of moths, 121. 
Chapter V: 
Influence of weather. 133 
Is a mild or a 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? 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; cat, 138; raccoons, 138; opossums, 138; bats, 
138; importance of birds, 139; negative evidence, 139; domestic 
fowls, 139; testimony of authors, 139; testimony of correspond¬ 
ents,'140; concerning 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 Nuttall Club, 144; Dr. Hagen’s letter, 150; 
the opinion of Dr. Elliott Cones, 152; letter of Dr. T. M. Brewer, 
156; letter of John Galvin, 156; general advice on the subject, 
158; list of insectivorous birds occurring in the cotton belt, 159. 
(6) Invertebrate enemies. 162 
Predaceous: Use of the terms predaceous and parasitic, 162; 
spiders, 162; Aphis lious, 164; mosquito hawks, 164; rear-horses, 
165; the spined soldier bug, 166; the green soldier bug, 167; the 
thick-thighed Metapodius, 167; the devil’s horse. 168; the rapa¬ 
cious soldier bug, 169; the Asilus flies, 170; tiger beetles, 173; 
