244 Mr. C. H. B. Grant on a Collection of 



(5) Apparently an immature dress. Above and below 



blackish brown, with some chestnut markings ; 

 thighs, belly, and under tail-coverts butfy white ; 

 tail sooty, tinged with chestnut. 



(6) A dress very close to No. 2, but with throat white. 



(7) All black, tail chestnut. 



I suggest that this species has two quite distinct phases, 

 the adults of which are respectively No. 6 and No. 7, and 

 that the sequence of plumage of both start and proceed each 

 along tlieir own lines as follows : — 



Phase A. Sequence includes dress Nos. 1, 2, 6. 



Phase B. „ „ „ Nos. 3, 4, 5, 7. 



A considerable series may show this to be right or to be 

 utterly wrong, but I put it forward as a theory for future 

 workers to unravel. 



The four specimens in the collection are respectively : — 



The females are each in the plumage No. 5, No. 6, and 

 No. 7. 



The male is almost in plumage No. 6, but there is some 

 black on the throat and some chestnut on the upper parts. 



In the Plate in Kuppell's Neue Wirb. Vog., fig. 1 is as 

 described in dress No. 6, and fig. 2 is in the plumage of 

 No. 7. 



[Irides brown ; bill black or bluish horn, fading to bluish 

 at base ; cere yellow ; legs and toes yellow. Very common.] 



107. Buteo desertorum. Rufous Buzzard. 



Falco desertorum Daud. Tiaite, vol. ii. 1800, p. 162 : 

 Cape of Good Hope. 



a. S imm. Amala River, 5400 ft. Oct. 18. 



Total length in flesh : 18i inches. Wing 338 mm. 



In good clean dress. 



[Irides brown; bill black; cere yellow; legs and toes 

 yellow. Common on the Amala River. Stomach contained 

 locusts.] 



108. Aqnila rapax. Tawny Eagle. 



Falco rapax Temm. PI. Col. i. 1828, pi. 455 : "Dans les 

 forets dc la partie meridionale de I'Afrique " (Levaillantj. 



