Bui. 174, Bureau of Plant Industry, U. S. Dept. of Agriculture. 



Plate II. 



■n -o 



m "d 



DO rn 



rn o 



O 



o 



> 



CD 



m < 



z ZD 



^1 -n 



1 DO 



rn 



!7> 

 > m 



^T DO 



o 



C 



z 

 H 



O 

 "n 



CO 



DO 



O 



z 

 i 



30 

 O 



H 



H m 



< 



DO 



o 

 ■n 



m 



r 



00 



m 



DO 



H 

 > 



m 

 > 



o 



I 

 m 



< * 



m 

 r > 



O 

 ■o 

 m 

 D 



H 

 I 

 m 



m 

 x 



T) 



m 



P2 



s 

 m 

 z 

 d 

 > 

 l~ 



> 



H 

 co 



> 



H 



T| 



O 

 DO 



H 



< 



> 



r 

 r 



m 



-< 



a 



D > 



OO 



z z 



CO 



I 



o 



CO 



o 



co 

 o 



CO 



