234 FALCONTDJE. 



Genus MILVAGO, Spw. 



Milvago chimango ( Vieill.). 

 (Plate IX. figs. 4 & 5.) 



Ibycter chi.uango, Sharpe, Cat. Birds B. M. i. p. 41 (1874) ; von Iheriny, 



Reo. Mus. Paulista, iv. p. 269 (1900) ; Nehrk. Kat. Eiersamml. p. 2 



(1899). 

 Milvago chimango, Sol. fy Huds. Argent. Orn. ii. p. 74 (1899) ; James, 



New List Chilian Birds, p. 7 (1892) ; Holland, Ibis, 1892, p. 204 ; 



Ajjlin, Ibis, 1894, p. 196; Sharpe, Hand-l, i. p. 244 (1899). 



The eggs of the Chimango Carrion-Hawk are subject to much 

 variation. Normally they are of a regular oval shape, but elliptical 

 examples are often met with. The shell is slightly rough in 

 texture and seldom possesses any gloss. 



The ground varies from cream-colour to pale buff, and is marked 

 in many different ways. In one type of egg the markings consist 

 entirely of minute rufous specks : in a second of blotches of choco- 

 late or reddish brown, which often form a cap at one end of the 

 shell ; in a third of specks and clouds of reddish brown ; and in a 

 fourth the markings form a nearly uniform rufous wash over the 

 whole egg, little of the ground-colour remaining visible. A series 

 measures from 1-55 to 1-86 in length, and from 1/22 to 1*45 in 

 breadth. 



2. Brazil. Crowley Bequest. 



1 . Rio, Brazil. Crowley Bequest. 



1. Uruguay. O. V. Aplin, Esq. [P.I. 



10. Argentine Republic, Nov. A. H. Holland, Esq. [C.]. 



1. Argentine Republic. Miss H. Lydekker [P.]. 



2. Buenos Ayres ( Tristram Coll.) Crowley Bequest. 



2. Buenos Ayres. Crowley Bequest. 



3. Mendoza (H. Burmeister), Salvin-Godman Coll. 



4. Central Chile, Nov. Berkeley James Coll. 



3. Central Chile. Berkeley James Coll. 



4. Central Chile (Landbeck). Berkeley James Coll. 

 4. Central Chile (Landbeck). Berkeley James Coll. 



Sub- Family ACCIPITRIN^E. 



Genus POLYBOROIDES, SmitJi. 



Polyboroides radiatus (Scop.). 

 (Plate X. fig. 5.) 



Polyboroides radiatus, Sharpe, Cat. Birds B. M. i. p. 48 (1874) ; Cowan, 

 Proc. R. Phys. Soc. JEdinb. vii. p. 148 (1882) ; Sharpe, Hand-l. i. 

 p. 244 (1899). 



Polyboroides radiatus, var. madagascariensis, Milne-Edwards 8f Grandi- 

 * dier, Hist. Nat. Madag., Ois. i. p. 50 (1879). 



The egg of the Madagascar Gymnogene in the Collection is a 

 very blunt oval, the shell being fairly smooth -and slightly glossy.' 



