Bui. 149, Bureau of Plant Industry, U. S. Dept. of Agriculture. 



PLATE VIII 



Tl 



D 



I 

 > 



5 



O ro 

 5 m 



mR 



en 



o H 



S 33 



m m 

 z m 



^^ 



5 H 



S 1 

 ' CO 



o 



O 

 33 

 O 



TJ 



I 



O 

 33 



m 

 co 



