Bui. 26, Bureau of Plant Industry, U. S. Oept of Agricultur 



Plate VII. 



o 



o 



. 33 

 CO D 

 O > 



> 



I - 

 < 

 O 

 z 

 a 



o 

 z 



(B 



m 



ii 

 m 



HH 



> 33 



* m 

 m m 

 z 

 -n 



33 



O 



5> 

 I 

 O 



I 



P 



CO 



2 

 o 



i O 



rn 33 



o 



O m 



O 33 



33 <S> 

 CO 



D 



m 

 Cn 



o 

 m 

 z 

 o 

 > 

 z 



o 



-n 



