PLATE I. 
Bul. 775, U. S. Dept. of Agriculture. 
t 
“I 
G 
< 
re 
fo} 
Ke 
ao 
oo 
ul 
wo 
ro) 
aS 
3 
<= “ 
re 
Os: 
a 
<5 
Aa 
= 
re) 
06 
wo 
=3 
co 
> 
OF 
=O 
=< 
O& 
sate) 
o 
ars 
or Ww 
a 
ww 
Ox 
< Oo 
a < 
on. 
-— 
ea) 
‘ 
ray 
aa | 
re) 
oO 
