12 



19a. Necrosyrtes monachus pileatus (Burch.J, S. Africa, 



Tray./ii., p. 195 (1824). [Hopetown dist., N.E. & 



Cap& Province.'] E, Africa. 

 Hooded Vulture. 



Larger; length 26 in. ; wing 480-510 mm. ; 

 with shorter and stouter bill. 



Fam. IV. AQUILIDM. 



•Crown of head always clothed with feathers, its sides either feathered 

 or bare ; outer toe not reversible. Female usually larger than 

 male. 



Sub-Fam. I. POLYBORINM. 



Toes connected near base by interdigital mem- 

 brane ; sides of face mostly bare. 



Gen. XIV. POLYBQRUS Vieill. (1816). 

 Type " Caracara " Buff [= P. plancus]. 



Nostrils oval. Size large (22-26 in.). 



1*20. Polyborus plancus (Mill.) Var. Subj. Nat. S. America, 

 Hist., PI. 17 (1778). [Tierra del Fuego.] . Patagonia to 

 Common Caracara. 20° S. lat. on 



W. & Amazon 

 Wing ? 405 ; tail 240 mm. ; above and on E. side, 

 below blackish brown with narrow whitish 

 bars ; cro\yn and belly uniform ; tail 

 whitish with dusky crosslines and a terminal 

 blackish band; face and throat white. 



t21. Polyborus cheriw^y cheriiiiay (Jacq.), Beitr., S. United States 

 p. 17, tab. 4 (1784). [Venezuela.'] Central and 



Audubon's Caracara. Northern 



S. America. 



