10 



Gen. XIXA. CLIMACOCERCUS CAB. (1845.) 



Feet very much smaller ; tarsi more slender, with 

 broad and regular scales in front . 



Size small, length ((J) 13 in. ; wing 6.9. Above 

 slate or rufous (rufous phase) ; tail with 3 

 greyish white bands ; below greyish white, 

 barred with greyish black ; throat white, 

 fore-neck rufous. 

 51. Climacocercus ruficollis (Vieill.), N. Diet., x., 

 p. 322 (1817). [S. America.] 

 Red-necked Harrier-Hawk. 



Above chocolate brown ; tail blackish, Avith 

 3 narrow white bands ; below thickly barred 

 with black and white ; throat brown. 

 51a. Climacocercus zonotlwrax Cab., J.f.O., 1865, 

 }). 406. \Porlo Cabello, Venez.] 

 Barred Hairier -Hawl<:. 



Above (male) ashy brown (female blackish) ; 

 tail blackish with 3 irregular white bands (4 

 in immature) ; below whitish, breast linely 

 barred with wavy blackish lines ; lower 

 abdomen white. 

 52. Climacocercus gilvicollis (Vieill.), N. Diet., x., 

 ]). 323 (1817). [Patr. ign. : Cayenne ? ] 

 White -throated Harrier-Hawk. 



Above blackish ; tail with 3 irregular white 

 bands ; throat and cheeks pale grey ; below 

 dull white, closely barred down to thighs with 

 blackish. 

 53. Climacocercus (juerUla'^, (Cass.), Pr. l*hil. 

 Acad., 1848. p. 87. JTalapa. Mex.] 

 GrcA-throated Harrier -Hawk . 



Venezuela, 

 Guiana, 

 Brazil, 

 Paraguay. 



Colombia, 

 Venezuela. 



Colombia cS^ 

 Amazonia to 

 E. Peru and 

 to20°S.lat. 

 in Brazil. 



Mexico to 

 Colombia. 

 Venezula, 

 Brazil, and 

 Ecuador. 



Gen. XX. GERANOSPlZlAvS Sundev. (1873). 



Tarsus scaled behind ; thighs Avithout overhanging, 

 tuft of feathers ; ridge of bill greater than half 

 length of middle toe (without claw) ; commissure 

 slightly festooned. 



Size moderate (length 16.5-24.5 in.). 



* In revising thii-g.r6up theflGiliis jugidari-^ and interstes aj^pear to be 

 untenable and arc iJ^ci'efure omitted.' ^ 



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