Smithsonian Report, 1 94 1. — Craighead 



Plate 2 



1. INFESTATION OF THE MOUNTAIN PiNE BEETLE IN A VIRGIN STAND OF SUGAR 



PINE. 



Yosemite National Park, Calif. August 1932. The light-colored trees are recent attacks and have been 



faded for only a short time. 



»Fr "^ 



2. PONDEROSA Pine Timber in Modoc National Forest. Calif.. Killed by the 



Western pine Beetle. 



Eastside pine type. September 1932. 



