108 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 40. 



in color than do those from the western part of the island, in this 

 respect resembling the form occurring on Pulo Laut. 



(For measurements and localities, see table, pp. 110 and 111.) 



EPIMYS SERUTUS. 



1906. Mus seruVus Miller, Proc. U. S. Nat. Mus., vol. 31, p. 59, July 23, 1906. 

 Twelve specimens collected on Pulo Serutu, Karimata Islands. 



EPIMYS CAR1MAT.E Miller. 



1906. Mus carimatse Miller, Proc. U. S. Nat. Mus., vol. 31, p. 59, July 23, 1906. 

 Type-locality, Karimata Island. 



Six rats of the Epimys rajali-surifer group collected on Pulo 

 Pelapis do not show any material differences from Epimys carimatse,. 

 There are more specimens inclined to be dark in the Pelapis series 

 than in the Karimata series, but none of them are darker than the 

 darkest of those from Karimata. Eleven specimens were collected 

 on Karimata in 1904. 



(For measurements, see table, p. 110.) 



EPIMYS PERFLAVUS, new species. 



Type.— Skin and skull of adult male, Cat. No. 151918, collected 

 on Pulo Laut, off southeast coast of Borneo, December 25, 1907, by 

 Dr. W. L. Abbott. Original number, 5684. 



Diagnostic characters. — A member of the Epimys rajah-surifer group 

 with the upper parts and sides strongly colored with bright ochraceous 

 buff. 



Color.- — Type : Upper parts and sides of head, neck, and body and 

 outer sides of legs bright ochraceous buff, sparingly mixed with light 

 brownish along the middle of the back; under parts whitish to cream 

 color, this color extending part way down the inner side of the legs; 

 an indication of an ochraceous buff collar on throat (present in five of 

 the paratypes and absent in three); feet whitish; upper surface of 

 tail dark, under surface whitish; ears dark brownish, scantily clothed 

 with dark hairs. 



Skull and teeth. — These show no tangible differences from the skulls 

 and teeth of Epimys rajah. 



Measurements. — See table, pages 110 and 111. 



Specirnens examined. — Eleven skins with skulls and two skulls with- 

 out skins, all from Pulo Laut. 



Remarks. — Epimys anambx Miller 1 shows the nearest approach in 

 coloration to E. perflavus, but the upper parts in the Anamba rats are 

 considerably darkened by brownish, and the external measurements 

 are not so large. Epimys anambx also appears to have a smaller skull, 

 with u relatively shorter rostrum. The skulls of Malayan rats change 



i Proc. Wash. Acad. Sci., vol. 2, p. 205, August 20, 1900. 



