PREFACE. 



The author lias been frequently urged by those 

 who have been interested in, or who have profited 

 by his writings, to republish, in compact form, the 

 articles that have appeared in the Missouri Entomo- 

 logical Reports, on the subject of the Rocky Moun- 

 tain Locust. The work herewith submitted to the 

 public is the result. It is simply an orderly bring- 

 ing together and revision of the matter contained in 

 sundry fugitive articles, and particularly of that 

 in the Seventh, Eighth and Mnth Reports afore- 

 mentioned, which have no circulation outside of 

 Missouri. It could not well have appeared with- 

 out the kind assistance of Prof. 0. S. Westcott, of 

 the High School, Chicago, to whom the writer is 

 under obligations for superintending the details of 

 publication during his constant absence in the field, 

 in the performance of Government duty. 



Trusting that the work will interest both the pop- 

 ular and the scientific reader, certain descriptive 

 passages, of more especial concern to the naturalist, 

 have not been excluded, but are printed in smaller 

 type than the text, so that they may be skipped by 



