LIST OF CUAPTERS. 23 



iDtrodaction. By Mr. Eiley. 



Chapter 1. Classification and Nomenclature : Characters of the Spe- 

 cies. By Mr. Thomas. 



Chapter 2. Chronological History. By Mr. Packard. 



Chapter 3. Statistics of Losses. By Mr. Thomas. 



Chapter 4. Agricultural Bearings of the Subject. By Mr. Thomas. 



Chapter 5. Native or Permanent Breeding-Grounds. By Mr. Packard. 



Chapter 6. Geographical Distribution. By Messrs. Thomas and Pack- 

 ard. 



Chapter 7. Migrations. By Messrs. Packard and Thomas. 



Chapter 8. Habits and Natural History. By Mr. Eiley. 



Chapter 9. Anatomy and Embryology. By Mr. Packard. 



Chapter 10. Metamorphoses. By Mr. Eiley. 



Chapter 11. Invertebrate Enemies (Insects, &c). By Mr. Eiley. 



Chapter 12. Vertebrate Enemies (Birds, &c). By Mr. Thomas. 



Chapter 13. Eemedies and Devices for Destruction. By Mr. Eiley. 



Chapter 14. Influence of Prairie Fires on Locust Increase. By Mr. 

 Eiley. 



Chapter 15. Influence of Weather on the Species. By Mr. Eiley. 



Chapter 16. Effects that generally follow severe Locust Injury. By 

 Mr. Eiley. 



Chapter 17. Uses to which Locusts may be put. By Mr. Packard. 



Chapter 18. Eavages of other Locusts in the United States. By Mr. 

 Eiley. 



Chapter 19. Locust Eavages in other Countries. By Mr. Packard. 



The first chapter relates to the classificatory position, name, and 

 characters of the species, which, while belonging to the same family as 

 the locusts of the Old World, is nevertheless purely an American insect, 

 occurring on no other continent. For a correct and proper understand- 

 ing of the whole subject, it is very essential that we discriminate be- 

 tween certain closely allied species, which are easily confounded by the 

 non-entomologist, and which yet have very different habits and instincts, 

 By means of a large amount of material from all parts of the country, 

 and by study of the immature stages, we have been able to accurately 

 define the three forms most apt to be confounded, and they will be dis- 

 tinguished throughout the report by the popular names of Eocky 

 Mountain locust {Caloptenus spretiis), Lesser locust {C. atlanis*), and the 

 Eed-legged locust t ( G. femur -rubr urn). We consider them good species, 

 as species go, and the plates will at once show their distinguishing char- 

 acteristics. As is found to be the case with nearly all species when 

 large material from widely different sections is studied, there are several 

 varieties and races that may be grouped around each of these three 

 typical forms, and which are intermediate between them j but it has 



* Originally defined from specimens from the IsTew England States, but subsequently found to have a 

 very wide range and not to be confined to the east. 



tLong known by this popular name on account of the red shanks (tibiae) which are not, however, con- 

 fined to this species but are characteristic of all three under consideration. 



