798 Messrs. Sclatei' and Mack worth Praed on [Ibis, 



Otis (Eupodotis) arabs stieberi. 



Otis arabs stieberi Neiim. J. £. 0. 1907, p. 307: Kusseri, 

 Shari river. 



[B. coll.] 1 Minawi Estate, El Darner, Ber. 



[C. & L. coll.] 1 Melut Jan., 1 Lake No Feb., 1 Balir 

 el Zeraf Feb. U.N. 



This race, separated by Neumann on account of the 

 colour of the crown, wliicli is gold and black, and not grey 

 and black, seems to extend from the Nile valley westwards. 

 There is a specimen of this race in tiie Museum from 30 

 miles S.W, of Rabat, Morocco. The El Darner bird is most 

 certainly of this race, while the Gedaref bird belongs 

 equally certainly to the other. Southern birds, while 

 nearer to this race than to 0. a. arabs, are as a rule darker 

 on the crown than northern birds, as is exemplified by the 

 specimen from the Bahr el Zeraf and by one or two others 

 in the Museum collection. The range of (). a. arabs is 

 from southern Arabia and the Red Sea Coast to l<]ritrea and 

 Kassala. 



The range of 0. a. stieberi is from tiie Nile Valley to 

 western Morocco and south to tlie Shari River. 



Otis arabs is tlie eommoijest of the large Bustards of the 

 Sudan. The specimen recorded by Ogilvie-Grant (Ibis, 

 1902, p. 453) as Eupodotis Lori, which was collected by 

 Hawker at Renk, proves on further examination to be an 

 example of O. a. stieberi. 



Otis (Neotis) cafra denhami. 



Otis denliami Chlldr. in Dcnh. & Chi pp. Trav. ii. 1826, 

 p. 199 : Interior of N. W. Africa; Reichw. V. A. i. p. 245 : 

 Butler, Ibis, 1908, p. 260. 



Confined to the western side of tiie Sudan, Kordofan, and 

 the western Bahr-el-Ghazal whence it ranges across to Lake 

 Chad. There are very few examples of this fine Bustard in 

 collections. Tiie largest specimen in the British Museum, 

 one obtained by Petherick in Kordofan, has a wing of 

 approximately 630 mm. The large size of the bill is at 

 once evident when compared with typical 0. c. cafra, 

 though in coloration they are not unlike. 



