‘AZIS Pods [VIPT puv od Aq aTQVIIsap Vy 
"| dNOUD ‘S3OLVLOd Y319d0D HSIN] SSYHL 
URTELOO HSTET 
init nk fen | 
PLATE Il. 
Bul. 176, U. S. Dept. of Agriculture. 
