PEIZE ESSAY. 



CHAPTEE. I. 



Accounts of the ravages of destructive insects, common, 1, 2. — Remedial measures 

 not recorded ; reason of this apparent neghgence, 2, •!. — Distinction between 

 foreign and naturalized insects, 5, 6. — Certain destructive insects, common in 

 America ; general immunity in Canada, and reasons for it, 6, 9.— Locusts at the 

 Cape of Good Hope ; Europe and Africa, 9, 12,— The seventeen 5-ear locust, 12. 

 Broods of seventeen year locust in the United States, 14.— Found in Canada, 

 14.— Vast abundance in Ohio, 16. — Appearance in the western prairies, 16. — 

 DestruQtiveness of, 16. — Pine Beetle in South Carolina, on the Ottawa, and in 

 the Hartz, 17.— Palmer Worm in New England, 18.— The Aphis, destructive- 

 uess of, in Great Britain, in Belgiuai, in America, 20, 21.— The Chinch Bug, 21. 

 —Common in the Western States, unknown in Canada, 22.— Cost of maintain- 

 ing destructive insects, in France, (22 a), in the United States, (22 a) (22 b) 

 Food of insects, 23, 24.— Distribution of wind, 25.— Connection with rocks, 26. 



1. Accounts of the sudden appearance and devastating pro- 

 gress of insects, injurious to vegetation, have been handed down 

 to us from the earhest times. Few events would seem to be 

 more Hkely to secure universal attention at the time of their 

 occurrence than the excessive multiplication over wide areas of 

 countless millions of insects, threatening the destruction of the 

 food of man. 



2. Such calamities must have appeared at all times and in all 

 nations, as alarming omens of future wide spreading distress ; 

 while, however, we frequently find interspersed among the records 

 of history numerous melancholy recitals of the ravages committed 



