EAST AFRICAN MAMMALS IN NATIONAL MUSEUM. 89 



RATTUS COUCHA TINCTUS Holllster. 



Plate 23. 



1918. Rattus coucha tinctus Hollister, Smithsonian Misc. Coll., vol. 68, No. 10 

 p. 1. January 16. (Kaimosi, British East Africa; type in U. S. Nat. 

 Mils.) 



Specimens.- — Nineteen, as follows: 



British East Africa : Kaimosi (Heller) . 



This large, dark colored subspecies of Rattus coucha is known only 

 from the type locality. 



Heller found 10, 12, and 13 embryos in females of the type series 

 collected in January, 1912. 



Geographical races of coucha from Victoria Nyanza not represented 

 in the United States National Museum collections are Rattus coucha 

 cuninghamei (Wroughton)' described from Chivi Island and inhabit- 

 ing other islands in the lake as well; and Rattus coucha victoria 

 (Matschie)- from Mwanza, south coast of Speke Gulf. The former is 

 described as having a very short tail and buffy white underparts; and 

 victorise is said to be pure grayish white below. In tinctus the under- 

 parts are only slightly lighter than the flanks and are intense dark 

 grayish buff, drab, or tawny olive. 



RATTUS COUCHA NEUMANI (Heller). 



Plate 23. 



1912. Epimys coucha neumani Heller, Smithsonian Misc. Coll., vol. 59, No. 16, 

 p. 8. July 5. (Neuman's Boma, Northern Guaso Nyiro River, Britisfe 

 East Africa; type in U. S. Nat. Mus.) 



Specimens. — Four, as follows: 



British East Africa: Neuman's Boma (Heller). 



The material representing this subspecies is far from satisfactory. 

 No one of the four specimens is sufficiently old to show the form or 

 size of the skull with extreme age; the teeth of the type, the oldest 

 specimen, are only moderately worn. The skins are all decidedly 

 grayish in color, with little rufous or buffy above, and with the under- 

 parts washed with buff. 



RATTUS COUCHA PANYA (Heller). 



Plate 24. 



1910. Epimys panya Heller, Smithsonian Misc. Coll., vol. 56, No. 9; p. 2. July 

 22. (Juja Farm, Athi Plains, British East Africa; type in U. S. Nat. Mus.) 



1910. Epimys panya Roosevelt, African Game Trails, Amer. ed., pp. 473, 478; 

 London ed., pp. 485, 489. 



' Mus cuninghamei Wroughton, Ann. and Mag. Nat. Hist., ser. 8, vol. 1, p. 256. March, 1908. 

 2 Mus (Epimys) microdon victorise Matschie, Sitz.-ber. Ges. nat. Freunde Berlin, 1911, No. 8, p. 342,. 

 October. 



