IV TABLE OF CONTENTS. 



Characters, habits, and naturax history— Continued. 



of hibernation, 15— different former opinions and beliefs concerning hi- 

 bernation, 16 — discussion of these opinions, 16— the chrysalides are killed 

 by a temperature below 22'^ F., 16 — paiasited chrysalides can bear greater 

 cold, 16 — fallacy of the belief that the chrysalis winters underground, 

 16 — ease with which erroneous conclusions can be drawn from mistaken 

 identity, 17 — the chrysalis of Aspila virescens mistaken for that of the 

 Aletia, 17 — chrysalides of other cotton larvae found underground in abun- 

 dance, 17— the chrysalis of Aletia killed by burial, 17 — ability of the 

 moth to survive the winter, 18— unreliability of most testimony as to the 

 hiberuation of the moth, 18 — other moths easily mistaken for it, 18 — 

 Hypena scabralis, 18 — Phoberia atomaris, 19— Leucania unipuncta, 19 — ab- 

 sence of testimony to the survival of the moths beyond March, 19— theory 

 of annual introduction of the species from some southern foreign coun- 

 try, 19— statement and discussion of Grote's arguments and of others in 

 support of this theory, 20 — arguments in favor of the hibernation of the 

 moth, 21 — both immigration and hibernation may occur, 21 — summary 

 of the evidence, 22 — Aletia hibernates only as a moth and only in the ex- 

 treme south, especially in Texas, 22. 



CHAPTER III. 



Past history of the Cotton Worm in the United States 23 



From 1793 to 1825, 23— from 1826 to 1846, 24— from 1847 to 1866, 25— from 

 1867 to 1869, 26— from 1869 to 1872, 27— in 1872 and 1873, 28— in 1873 and 

 1874, 29— in 1875 and 1876, 30— in 1877 and 1878, 31- in 1879 and 1880, 32— 

 in 1880 and 1881, 33 — history of remedies, 34 — hand-pickiug and poultry, 

 34 — fires, 35— other remedies, 35-36 — arsenic, 36 — Paris green, 36-38 — 

 planting jute, 38 — machinery, 38 — London purple, 38— pyrethrum, 38. 



CHAPTER IV. 



The Cotton Worm in other countries .» 39 



Geographical distribution of Aletia xylina, 39 — other insects injurious to 

 cotton in the Eastern Hemisphere, 39 — occurrence of Aletia xylina on the 

 Pacific coast of Mexico, 39-40 — on the Gulf coast of Mexico, 40-41 — in 

 Yucatan, 41 — in the West Indies, 42 — in the northern countries of South 

 America, 42-43 — in Brazil, 43-44. 



CHAPTER V. 



On the anatomy of Aletia. By Edward Burgess and C. S. Minot 45 



Circumstances under which this chapter was prepared, 45 — exteroal anat- 

 omy of larva, 45 — true legs, 45 — prolegs, 46 — colored markings, 46 — stig- 

 mata, 46 — internal anatomy of larva, 47 — head, 47 — ganglia, 47 — diges- 

 tive canal, 47 — malpighian vessels, 47 — salivary glands, 47 — dorsal vessel, 

 47 — stomach, 48 — external anatomy of imago, 48— method of preparing 

 the exoskeleton for examination, 48 — head and appendages, 48— protho- 

 rax, 48-49— mesothorax, 49 — metathorax, 49-50 — supposed organ of hear- 

 ing, 50 — abdomen, 50-51 — spiracles, 51 — legs, 51— scales, 51-52 — scale- 

 pores, 52 — proboscis, 52.— spines, 53 — internal anatomy of imago, 53 — di- 

 gestive canal, 53 — pharynx, 53-54 — salivary glands, 54— oesophagus, 54— 

 food reservoir, 54-55 — stomach, 55 — malpighian vessels, 55— intestines, 

 55 — aorta, 55 — nervous system, 55 — ganglia, 55 — terminal body segments 

 and organs of rei^roduction, 56 — brush-sac, 56 — male organs of reproduc- 

 tion, 56— testes, 57 — vasa deferentia, 57— penis, 57 — female organs of re- 

 production, 57 — ovaries, 57— sebaceous glands, 57 — vagina, 58 — copulatory 

 pouchy 58— terminal abdominal segments of the female, 58. 



