Bui. 34, Bureau of Forestry, U, S. Dept. of Agriculture. 



Plate IX. 



H 

 i 

 m 



u 



z 



z 

 a 



30 



O 



o 

 > 



o 



33 



o 



Z 

 D 

 > 

 O 

 7C 



O 

 O 



O 

 > 



