MAP of a poirnoxo. wi ;STi;HX NORTH AMERICA 
SHOWING THE DISTRIBUTION OF VEGETATION WITH 
REFERENCE TO THE MULTIPLICATION OF AND MEANS OF SUBDUING THE 
ROCKY MOUNTAIN LOCUST. 
Prepared underlie direction of the r.S.Kiitoinoloeical Commission 
l>v Henry Gannetl ElM. 
i 3 Map I. 
'<>'•'• -MIDDLE 
z EASTERN SECTION 
