THE GAZELLES AND THEIR ALLIES 503 



size and more wide-spread horns. It differs from lacuum 

 by darker coloration and the presence in the adult female 

 of a dark flank band. From roosevelti it may be distin- 

 guished by the decidedly smaller and more parallel horns 

 and by the smaller and lighter-colored dark nose spot. 



The dorsal color of the adult male is light vinaceous- 

 cinnamon, paling toward the head and on the sides, where 

 it becomes pinkish-buff. The top of the rump and the 

 hinder border of the thighs is marked by a wide area of 

 pure white, which is continuous with the white basal por- 

 tion of the tail. The terminal half of the tail is black. The 

 rump area is bordered in front by a bistre pygal stripe 

 one-half inch wide. The flanks have a very slight indication 

 of the flank band in the form of a lighter band of light 

 buff bordering the broad band of pinkish-buff above. The 

 outside of the legs is pinkish-buff like the sides of the body. 

 The hoofs in front are bordered by brown hair. The under- 

 parts and the inside of the legs and the lower throat are 

 silky white. The top of the head and the median line of 

 the snout are cinnamon-rufous. The middle of the snout 

 is marked by a dark sepia blotch. There is a grayish patch 

 about the horn bases and a blackish one above the eyes. 

 The sides of the face are marked by a broad white band 

 above the eye extending forward to the dark snout si)ot, and 

 bordered below by an ill-defined, narrow dusky-cinnamon 

 streak from the eye to the muzzle. The orbital area is 

 white with a bistre-brown supraocular spot extending to 

 the horn base. The tip of the snout is i)ale pinkish-buff. 

 The lips and chin are white. The forethroat is white like 

 the chin, but the midthroat is pinkish-cinnamon like the 

 nape. The ears are f)inkish-cinnamon, bordered at the tip 

 by bistre, and the inside and the base are white. The adult 

 female is like the male in color, but has a well-marked dark 

 flank band and broader and darker pygal stripes. The 

 nursing young are buffy-drab in color, as described under 

 roosevelti. 



Specimens collected by the Rainey expedition have been 

 examined from the desert country watered by the Northern 

 Guaso Nyiro from the junction of the Ngare Narok down 

 as far as the Lakiundu junction. North of this latter point 

 specimens have been examined from Karo, Longaya, and 



