8 



Preface. 



the farmer, or by others who do not care for such 

 details. These will be found principally in the first 

 chapter. Except where necessary, for the sake of 

 precision, technicalities have been avoided. The 

 term "larva," frequently employed, means the 

 young or second state of an insect — that succeeding 

 the egg ; and the term ' ' pupa ' ' means the third state, 

 or that preceding the perfect or mature form. In 

 most insects, the larva is vermiform, and totally 

 unlike the parent, while the pupa is dormant or 

 quiescent. In the locust, however, the change from 

 one state to another is gradual, and the pupa is 

 active. 



The sign $ wherever used, indicates "male;" 

 the sign $ "female." The illustrations are from 

 nature by the author, unless otherwise stated, and 

 where enlarged, the natural size is usually given in 

 hair-line. The facts and recommendations are the 

 result of extensive personal experience, and that 

 they may prove of benefit to the large class which 

 suffers from locust injuries, is the earnest desire of 



The Author. 



St. Louis, Mo., May 15th, 1877. 



