MAMMALS OF ANGLO-EGYPTIAX SUDAX — SETZER 469 



are therefore referred to heuglini rather than to P. d. tessellatus from 

 Ankole, Uganda. 



Cercopithecus aethiops aethiops (Linnaeus) 



Figure 3,b 



Simia aethiops Linnaeus, Systema naturae, ed. 10, vol. 1, p. 28, 1758. (Sennaar.) 

 Cercopithecus toldti Wettstein, Anz. K. Akad. Wiss. Wien, Math.-Nat., vol. 53, 



p. 189, 1916. (Jebel Riha, near Kadugli.) 

 Cercopithecus {Chlorocebus) cailliaiidi Wettstein, Denkschr. K. Akad. Wiss. 

 Wien, Math.-Nat., vol. 94, p. 643, 1918. (Blue Nile.) 



Specimens Examined: Fourteen, all in BjM, from: White Nile, 

 lat. 14° N., 3; Mongalla, Mom District, 1; Kamisa, Binder River, 8; 

 Omdurman, 1; near Er Renk, 1. 



Measurements: Average external measurements, respectively, of 

 two males and two females from Kamisa, Binder River, are as fol- 

 lows: Length of head and body 444.5, 441.3; length of tail 605, 550; 

 length of hind foot 129, 106; length of ear 32, 29. 



Remarks: The specimens from Kamisa are virtual topotypes of 

 this subspecies. All of the specimens examined are paler m dorsal 

 coloration than are any of the adjacent kinds. However, there is a 

 considerable amount of variation in the general color. The thighs 

 and lower hind legs are pale gray with only a faint suggestion of the 

 banding which is promment in C. a. arenarius. 



Cercopithecus aethiops arenarius (Heller) 



Figure 3,6 



Lasiopyga pygerythra arenarius Heller, Smithsonian Misc. Coll., vol. 61, No. 17, 

 p. 11, Oct. 21, 1913. (Marelle Waterholes, Marsabit Road, Kenya Colony.) 



Specimens Examined: Two, both in BM, from Issore, Imatong 

 Mountams. 



Measurements: No measurements of this form are available from 

 the Sudan since the only two specimens are native skins. 



Remarks: These two skins are both "native" skins and thus not 

 too reliable but are probably from the Imatong mountains. The 

 thighs and lower hind legs are marked with cross bands of dark gray 

 on a light gray background and not uniformly clear gray as in the 

 next adjacent form johnstoni. This marking of the thighs and legs 

 is far more distinct in the Imatong specimens than in topotypes of 

 arenarius in the British Museum collection. 



I feel that for the present it is best to refer these specunens from 

 the Imatongs to arenarius since the material is not adequate to 

 definitely establish their true identity. 



