110 BULLETIN 99, UNITED STATES NATIONAL MUSEUM. 



1909. Lophuromys rubecula Dollman, Ann. and Mag. Nat. Hist., ser. 8, vol. 4, 



p. 551. December. (Elgonyi, Mt. Elgon, British East Africa; type in 

 British Museum.) 



1910. Lophuromys aquilus Roosevelt, African Game Trails. Amer. ed., pp. 472, 



477; London ed., pp. 484, 489. 

 1914. Lophuromys sp. Cockerell, Miller, and Printz, Zool. Anz., vol. 44, p. 

 437. June 23. 



Specimens. — Two hundred and fifty-three, from the following 

 localities : 



Uganda: Kampala, 6, including 4 in alcohol (Loring); Kikanda, 

 1 (Loring); Kisingo, 1 (Loring); Nkyanuna, 1 (Loring). 



British East Africa: Aberdare Mountains, 23, including 5 in 

 alcohol (HeQer) ; Engare Narok River, 5 (Loring, Heller) ; Fort Hall, 



1 (Loring) ; Guas Ngishu Plateau, north of Ravine Station, 3 in 

 alcohol (Heller); Kaimosi, 29, including 18 in alcohol (HeUer) ; 

 Kakumega, 1 in alcohol (Heller) ; Kisumu, 3 (Heller) ; Lukosa Rivei , 



2 (Heller) ; Mount Kenia, west side, 100, including 26 in alcohol 

 (Loring, Heller, Mcarns) ; Naivasha 52, including 3 in alcohol (Loring, 

 Mearns); Nyeri, 7, including 3 in alcohol (Loring); Nzoia River, 4, 

 including 3 in alcohol (Heller); Oljoro O Nyon River, 2 (Heller); 

 Ravine, 1 in alcohol (Heller) ; Sirgoit Lake, 3 in alcohol (Heller) ; 

 Southern Guaso Nyiro River, 2 in alcohol (Mearns) ; Wambugu, 5, 

 including 1 in alcohol (Loring, Mearns). 



German East Africa: Mount Kilimanjaro, 1 (Abbott) 

 There appear to be no constant characters by which this form may 

 be further divided into geographical races. A suitable series of 

 specimens from the type locahty of aquilus is still lacking, and until 

 this is obtained it will be impossible to determine with certainty the 

 status of Dollman's Lophuromys zena. Every feature of the tjpe- 

 specimen of aquilus can bo matched in some specimen from British 

 East Africa, however, and these latter do not vary geographically 

 among themselves to any appreciable extent. Allowing for shght 

 variations in tail and body measurements by different collectors and 

 the usual differences of pelage due to wear and fading the species 

 seems remarkably constant in both external and cranial characters 

 from KiUmanjaro to Albert Nyanza, There is some difference in 

 the size of the teeth in various specimens, but aside from what 

 appears to be a slight reduction with altitude it amounts to little. 

 I can not see the slightest difference between specimens from the type 

 locality of zena and those from the Guas Ngishu Plateau, Kavirondo 

 and Uganda, which should represent Dollman's Lophuromys ruhecula. 

 At first sight the Kaimosi and Lukosa River skins appear darker than 

 usual, but as a matter of fact fresh, clean skins from Kenia and 

 Naivasha match them almost precisely. The color of the hind foot 

 varies greatly in the relative amount of dark and light area, but dark 

 feet and light mottled feet are not confined to any one region. The 

 same may be said of the intensity of color of the belly. 



