[Doubtfully distinct.] 

 17a. Neophron percnopterus nibripersonatus Zarudav 

 & Harms., Orn. Mb., x., pp. 52-3 (1902). 



Smaller than typical form 

 wing 15.5. 

 17b. Neophron percnopterus ginginianus 

 Ind. Orn. i., p. 7 (1790). 

 Indian White Vulture. 



length 21 in. 



(Lath.), 



Persian 

 Baluchistan. 



Indian 

 Peninsula, 

 very rare 

 in Ceylon. 



Gen. XIII. NECROSYRTES Gloger (1842). 

 With a fur-like chest-patch. 



Plumage chocolate brown ; hind neck covered 

 with whitish doAvn ; crop-patch creamy 

 brown, encircled with white down. Length 

 24 in. ; wing 18.50. 

 18. Necrosyrtes monachvs monachus (Teinm.), PI. N.E. & 

 Col., i., pi. 222 (1823). E. Africa, 



Northern Hooded Vulture. W. Africa. 



Larger ; length 26 in. ; wing 20 in. ; with 

 shorter and stouter bill. 

 18a. Necrosyrtes monachus pileatus (Burch.), Trav.^ 

 ii.,p. 105, (1824). 

 Hooded Vulture. 



S. Africa. 



Fam. II. FALCONIDM. 



Crown of head always clothed with feathers, its sides either 

 feathered or bare ; outer toe not reversible. 



Sub-Fam. I. POLYBORINjE. 



Toes connected near base by interdigital mem- 

 brane ; sides of face mostly bare. 



Gen. XIV. POLYBORUS Vieill. (1816). 

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



Above and below blackish brown with narroAv 

 whitish bars ; tail whitish with a terminal 

 blackish band ; face, neck and breast white 

 with blackish bars. 

 19. Polyborus plancus (Mill.) Var. Subj. Nat. Hist., S. America, 

 PI. 17 (1778). Patagonia to 



Common Caracara. 20'' S. lat. on 



W, & Amazon 

 on E. side. 



