72 CIRCUS ^RUGINOSUS. 



at Potchefstroom, in the Transvaal, in December 1869. On the western 

 coast, however, it has twice been procured by Senior Anchieta, at Huilla and 

 on the Rio Coroca, in the Mossamedes district. I may add that the late 

 M. Jules Verreaux tells us that it had occurred to him at the Cape during 

 his fifteen years' sojourn there." 



There appears to be a tendency in several Harriers to turn black with 

 age ; and I do not regard the example in the Plate as a common melanism, 

 but rather as an aged specimen. Feathers would seem to blacken with age, 

 but hair to whiten. I cannot, however, lay down a rule ; more experience is 

 necessary. 



