100 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.40. 



Measurements. — For external and cranial measurements of the 

 type and series, see table, pages 101 and 102. The length of hind 

 foot of this subspecies runs from 38 to 44 mm. nearly always over 

 40 mm., of the typical subspecies, 35 to 39, always under 40. 



EPIMYS NEGLECTUS LAMUCOTANUS, new subspecies. 



Type.— Skin and skull of adult female, Cat. No. 145497, collected 

 on Pulo Lamukotan, off west coast of Borneo, May 10, 1907, by 

 Dr. W. L. Abbott. Original number, 5224. 



Diagnostic characters. — A form of Epimys neglectus Jentink, char- 

 acterized by a longer maxillary tooth row. 



Distribution. — The islands of Lamukotan and Panebangan, off the 

 west coast of Borneo, and Pulo Mata Siri, off the southeast coast of 

 Borneo. 



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

 mixture in about equal proportions of blackish brown and a color 

 between ochraceous buff and clay color; under parts, cream buff; 

 outside of legs similar to upper parts ; inner side similar to under parts ; 

 tail light brownish, scantily haired, three brownish hairs to each scale, 

 and each hair about the length of one and one-half scales ; outside of 

 ears with short brownish hairs, inside with light dull buffy hairs. 



Pelage. — As in Epimys neglectus ducis above. 



Shull and teeth. — These are of the same general form and size as in 

 the alexandrinus-rattus group of rats. The maxillary tooth row 

 averages longer, from about 7 to 7.6 mm., than it does in typical 

 Epimys neglectus, about 6.5 to 7. 



Measurements. — For external and cranial measurements of the 

 type and series, see table, page 101. The length of hind foot of this 

 subspecies runs from 35 to 40 mm., nearly always under 40, about 

 the same as in the typical subspecies. 



Remarks. — The Mata Siri skins have on the average slightly longer 

 hind feet than do skins from Panebangan and Lamukotan. Some of 

 them have feet quite as large as do the members of the preceding 

 subspecies, but they seem closest to the present form. 



