36 BULLETIN 99, UNITED STATES NATIONAL MUSEUM. 



The single odd skull from Rhino Camp, Lado, is younger than any 

 specimen from Uganda, but appears to represent the same form. It 

 is really of little importance except to prove the presence of some 

 species of Tatera at that locality. A form of the liodon group has 

 been described by Thomas from the upper Welle River, Congo, as 

 Tatera diclirura} This locality is comparatively near to Lado, but 

 is in the Congo drainage and it is probably doubtful if dickrura 

 extends into the Nile watershed at Rhino Camp, although certain 

 large mammals cross the low divide. 



It would not be surprising, in view of the close resemblance, if 

 the form here under consideration was found eventually to inter- 

 grade with Tatera liodon smitJii along the east side of Albert Nyanza. 



TATERA ROBUSTA (Cretzschmar). 



1826. Meriones rohustus Cretzschmar, Atlas Reise nordl. Afrika von Riippell, 

 vol. 1, p. 75, pi. 29, fig. b. (Ambukol, Sudan; type in Frankfort Museum.) 

 1902. Tatera rohustus Anderson, Zool. Egypt, Mamm., p. 265. 



1905. Tatera rohustus Schwann, Nov. Zool., vol. 12, p. 2. January. 



1906. Tatera rohusta Wroughton, Ann. and Mag. Nat. Hist., ser. 7, vol. 17, p. 



494. May. 



Specimen. — One, as follows: 

 Sudan: Naikhala (Rothschild). 



TATERA BOHMI VARIA HeUer. 



Plate 12. 



1910. Tatera varia Heller, Smithsonian Misc. Coll., vol. 56, No. 9, p. 1. July 

 22. (Southern Guaso Nyiro River, British East Africa: type in U. S. 

 Nat. Mus.) 



1910. Tatera varia Roosevelt, African Game Trails, Amer. ed., pp. 472, 476; 

 London ed., pp. 484, 488. 



Specimens. — Thirty, including one in alcohol, as follows: 

 British East Africa: Southern Guaso Nyiro River (Loring, 

 Heller). 



This splendid series contains specimens of all ages from young in 

 the first pelage to old adults. The juvenile coat is dark and glossy, 

 much darker than in adults; this is followed by a paler post-juvenile 

 pelage of dull grayish buff which is quite different from the brighter 

 coat of adults. The species belongs to the subgenus Gerhilliscus. 



Lives in the open plains, among the grass; not among bushes, nor at foot of hills. 

 Lives in burrows, one animal apparently having several, each burrow with a little 

 mound at the entrance. Nocturnal. (Roosevelt, African Game Trails, Amer. ed., 



p. 476.) 



Genus LOPfflOMYS Milne-Edwards. 



1867. Lophiomys Milne-Edwards, L'Institut, vol. 35, p. 46. February 8. 



(L. imhausii.) 

 1867. Phractomys Peters, Zeitsch. Naturw. Halle, vol. 29, p. 195. February. 



(L. scthiopicus.) 



» Ann. and Mag. Nat. Hist., ser. 8, vol. 16, p. 147. August, 1915. 



