PLATE V. 
nce mos = ORAS ORO ens 
FOR A SPRING MONTH. 
Zz 
2 
E 
op) 
ul 
co) 
oO 
=) 
ip) 
a 
a 
< 
O 
faa) 
< 
oO 
< 
| 
faa] 
PAPE LRA E ASTIN LR MORIN PHOTONS IOC ETE GE PROSE IE ERE, 
Bul. 305, U. S. Dept. of Agriculture. 
