580 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loe 



in the Sudan which are referable to this subgenus are G. dorcas, G. 

 leptoceros, G. rvjifrons, and G. thompsonii. 



The second subgenus in the Sudan is Nanger. It is characterized 

 by the following: Females with well developed horns; body size large; 

 and white of rump extending rather far into fawn color of body. The 

 species in the Sudan which are referable to this subgenus are G. granti, 

 G. soemmerringii, and G. dama. 



Key to the species in the subgenus Gazella 



1. Flank band indistinct 2 



Flank band black 3 



2. Horns usuallj' lyrate dorcas 



Horns usually not lyrate leptoceros 



3. Nose spot absent; light face stripes buffy rufifrons 



Nose spot black ; light face stripes white thompsonii 



The species of the subgenus Nanger may be distinguished from one 

 another by the length of the horns. In granti, the horns approximate 

 30 inches and lack any terminal hooking; soemmerringii has horns ap- 

 proximating 22 inches and the tips hook inward; in dama the horns 

 approximate 13 inches and the tips hook forward and upward. 



Gazella dorcas Isabella Gray 



Figure 10, d 



Gazella Isabella Gray, Ann. Mag. Nat. Hist., ser. 1, vol. 18, p. 214, September 1846. 



(Type locality fixed as Abyssinia by Blaine, 1913, p. 292.) 

 Antilope dorcas, a isidis Sundevall, Kongl. Svenska Vet.-Akad. Handl., Stockholm 



(1845), p. 267, 1847. (Sennaar, Nubia, Egypt.) 



Specimens Examined: Two, both in BM, from: Mashail, 1; Khor 

 Hadhad, 1. 



Gazella dorcas littoralis Blaine 



Figure 10,d 



Gazella UUoralis Blaine, Ann. Mag. Nat. Hist., ser. 8, vol. 11, p. 295, March 1913. 

 (Khorasot, Nubian Desert.) 



Specimens Examined: Seventeen, from: Suakin, 3 (BM) ; 5 miles 

 south of Suakin, 1 (BM) ; 12 miles south of Suakin, 1 (BM) ; Atra 

 Rabai Hills, 1 (BM) ; Hafia, 1 (BM) ; Dongola, 2 (BM) ; Jebel Bawati, 8. 



Gazella dorcas osiris Blaine 



Figure 10,d 



Gazella littoralis osiris Blaine, Ann. Mag. Nat. Hist., ser. 8, vol. 11, p. 295, March 

 1913. (Nakheila, near junction of Atbara with the Nile.) 



Specimens Examined: Ten, all in BM, from: Nakheila, 5; Omdur- 

 man, 1 ; near El Fasher, 1 ; Kordofan, 1 ; 10 miles northwest of El Fasher, 

 1; 10 miles east of El Fasher, 1. 



