PLATE IV. 
Bul. 775, U. S. Dept. of Agriculture. 
wave 
‘sisulj GanoVd 
-A0VYOLS 
‘sOD5] ALUIG GNV Ganovuo ANV ‘sd9S 
‘sisul4 VYLXS GANOVd 
ADVYOLS OLNI 
SldIS0SUY LNAYUYND ONIGWYE) 
