12 



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



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



Cape 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. POLYBORUS Vieill. (1816). 

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



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



t*20. Polyborus plancus (Mill.) Var. Subj. Nat. 

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

 Common Caracara. 



Wing $ 405 ; tail 240 mm. ; above and 

 below blackish brown with narrow whitish 

 bars ; crown and belly uniform ; tail 

 whitish with dusky crosslines and a terminal 

 blackish band ; face and throat white. 



S. America, 

 Patagonia to 

 20° S. lat. on 

 W. & Amazon 

 on E. side. 



•(■21. Polyborus cheriway cheriway (Jacq.), Beitr., 

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

 Audubon's Caracara. 



S. United States 

 Central and 

 Northern 

 S. America. 



