z 
 
 
     2Atbvam  ot 
 
MUbo 7,Tco.lb 
 
 
Reprinted from THE CONDOR, Vol. XXXIX, January-February, 1937, pp. 9-10 
 
 
THE THICK-BILLED PARROT IN CHIHUAHUA 
 
 
                By ALDO LEOPOLD