Map I. 
SOUTH WEST CRN SECTION 
MAP of A portion of WESTERN NORTH AMERICA 
SHOWING THE DISTRIBUTION OF VEGETATION WITH 
REFERENCE TO THE MULTIPLICATION OF AND MEANS OF SUBDUING THE 
ROCKY MOUNTAIN LOCUST. 
Prepared uriderthe direction of the IT.S.KntoHiologieal Commission 
|»v Henvv (iaimctl E, M 
1870. 
Probable llrocdine Grounds 
Grass-covrrcd. Kasilv bura< 
I'Wcsl Lam 
Saj£e Land and senri deserl 
,\'<>i eaaely bupned. 
I 
Desert. 
