showing native thicket of young pine about 10 to 12 feet in height at Rehoboth, Massa- 

 chusetts. The white tags indicate diseased trees, most of which are infected on 

 the main trunk near the base. 



Large native tree which was badly infected with the blister rust. The pile of brush 

 in the foreground is made up of diseased twigs and branches of various sizes cut 

 out of this tree. 



