MAI* <>i a portion of WESTERN NORTH AMERICA 
SHOWING TH E DISTRIBUTION OF VEGETATION WITH 
REFERENCE TO THE MULTIPLICATION OF AND MEANS OF SUBDUING THE 
ROCKY MOUNTAIN LOCUST. 
Prepared underthe direction of (lie U.S. Entomological Commission 
Bj Henry Gannett E M. 
Map I. 
NORTH WF. STERN SECTION 
1879. 
Vob eible Breeding Grounds. 
Forest Land. 
Grass -covered. Easily biu-uod. 
SageLand and semi- desert. 
Not easely burned. 
Desert. 
