66 BULLETIN 99, UNITED STATES NATIONAL MUSEUM. 



The Ruwenzori editus has never been satisfactorily separated from 

 a subspecies of haccJiante described by Thomas from the Victoria 

 Nile {(E. haccJiante unyori) m 1903. With a knowledge of the varia- 

 tions within species of this genus due to age or individual peculiarities, 

 the two forms, from the descriptions only, seem very much alike. It 

 is possible that this Kavirondo form should be called (Enomys 

 bacchante unyori. 



There is much variation within the Kaimosi series. The feet are 

 especially variable in color, ranging from light buff, through deep 

 ochraceous, to ahnost blackish. The amount of deep buff or pinkish 

 buff bordering the lighter underparts is also exceedingly variable, 

 as is the amount of ochraceous in the lower back and the general 

 brightness of the pelage. 



(ENOMYS BACCHANTE VALUCOLA Heller. 



Plate 19. 



1914. Oenomys hypoxanthus vallicola Heller, Smithsonian ilisc. Coll., vol. G3, 



No. 7, p. 11. June 24. (Lalce Naivasha, British East Africa; type in 

 U. S. Nat. Mus.) 



Specimens. — Four, as follows: 



British East Africa: Lake Naivasha, 2 (Loring); Naivasha 

 Station, 2 (Loring). 



This is a very slightly marked form scarcely separable from the 

 Kavirondo subspecies which I have called editus. Much larger 

 series from the type region "W'ill be necessary satis ftictorily to settle 

 its status. The two adult specimens are extreme in brightness of 

 the rump and lower back and the two younger skins are lighter 

 colored than the few young of about the sam.e age in the series of 

 editus. There appear to be no satisfactory characters by which the 

 skulls may be separated. 



Genus RATTIIS Fischer. 



1803. Ruttus (misprint for Rattus) Fischer, Nationalmus. Naturg. Paris, vol. 2, 



p. 128. (/?. norvegicus.y 

 1827. Rattus Donovan, Nat. Repos., vol. 3, pi. 73, text p. 1 (1834). (/?. rattus.)'^ 

 1881. Epimys Trouessart, Bull. Soc. Angers, vol. 10, p. 117. {R. rattus.y 



1915. jEihomys Thomas, Ann. and Mag. Nat. Hist., ser. 8, vol. 16, p. 477. 



December. {R. haiserihiiuM.) 

 1915. Praomys Thomas, Ann. and Mag. !Sat. Hist., ser. 8, vol. 16, p. 477. 



December. (R. tullhergi.) 

 1915. Myomys Thomas, Ann. and Mag. Nat. Hist., ser. 8, vol. 16, p. 477. 



December. (R. colonus.) 



• For discussion of type-species of Rattus Fischer See Ilollister, Froc. Biol. Soc. Wasliinpton, vol. 29, 

 p. 126, June 6, 1916; Thomas, Ann. and Mag. Nat. Hist., ser. a, vol. 18, p. 240, August, 1916; and Hollister, 

 Proc . Biol. Soc. Washington, vol. 29, pp. 206 207, Sept. 22, 1916. 



' For note on type-species ot Rattus Tonovan see Hollister, Proc. Biol. Soc. Washington, vol.29, p. 126, 

 June 6, 1916. 



8 For note on type-species of Epimys Trouessart see Miller, Proc. Biol. Soc. Washington, vol. 23, pp. 

 57-60, April 19, 1910. 



