BIEDS OF ETHIOPIA AND KENYA COLONY 



143 



form, and indicates that the typical race occurs across northern 

 Ethiopia and in the Sudanese provinces of Kassala and Sennar. 

 The measurements of the specimens examined are : 



Locality 



Sudan, Gabardi 



Ethiopia: 



ToUo 



Camp 1, Errer 



The easternmost record for stieberi is a bird collected at Lake No, 

 Bahr-el-Ghazel. 



This is all Avritten on the assumption that the two races are dis- 

 tinct. However, Lynes -'' writes that he can not detect any but indi- 

 vidual differences between Darfur and Moroccan {stieberi) specimens 

 and others from Arabia (ara'bs), and that the so-called racial charac- 

 ters depend on staining or on age of the feathers, and have no geo- 

 graphical significance. 



Without examining material from the western Sudan, I hesitate 

 to depart from the check list arrangement and prefer to use a tri- 

 nomial for the Abyssinian birds. 



CHORIOTIS KORI STRUTHIUNCULUS (Neumann) 



Otis kori struthiuiiculus Neumann, Journ. f. Ornith., 1907, p. 306: Lake 

 Zwai. Ethiopia. 



Specimens collected: 



Male (head and neck only), Gada Bourca, Ethiopia, December 

 24, 1911. 



Male (head and neck only), Hawash River, Ethiopia, February 

 6, 1912. 



To look at a museum series of these birds, including specimens of 

 different ages, the size variations are so great that one gets the 

 impression of two species, a larger and a smaller one, " lumped " 

 together under one name. However, age differences (after the as- 

 sumption of adult plumage) explain this enormous diversity of size. 

 In an allied species {G. arabs) Lynes ^^ records that the weight varies 

 from 22 pounds for an old male to 7% pounds for an immature but 

 fully grown female. The differences in kori are at least as great. 



Neumann ^^ divided hori into two races : Typical southern birds 

 (south of the Zambesi, in the high veldt) have the lores and super- 



» Ibis, 1925, p. 553. 



^ Idem, 1025, p. 553. 



- Journ. f. Ornith., 1007, p. 306. 



