MAMMALS FROM MOUNT COFFEE, LIBJCRIA 637 



roots of zygomata 13; depth of braincase at front of basioccipital 

 8.8; fronto-palatal depth at posterior extremity of nasals 6.6; least 

 depth of rostrum behind incisors 5.6; maxillary toothrow (alveoli) 6; 

 breadth of first upper molar 1.8; mandible 18; mandibular toothrow 

 (alveoli) 5.8. 



Specimens examined. — One, the only specimen of Mus defua ob- 

 tained. 



Remarks. — Miis dcfua is so readily distinguished from J/, rutilans 

 that no special comparison is necessary. Its most obvious characters 

 are the more closely annulated tail, plumbeous underfur of belly, and 

 narrow antorbital foramen. 



MUS ERYTHROLEUCUS Temminck. 



Native name, Deh-foua. 



The single specimen in the collection has been determined by Mr. 

 Wm. E. de Winton. It was taken on March 30. Measurements: 

 total length 204; tail vertebrae 96; hind foot 23.4 (22). 



MUS TULLBERGI ROSTRATUS subsp. nov. 



Native name, Deh-foua. 



Type. — Adult male (skin and skull) no. 83836, U. S. National 

 Museum. Collected at Mount Coffee, Liberia, May 7, 1897. Origi- 

 nal no. 60. 



Characters. — Slightly larger than AIus tullbergi tullbergi., but 

 similar in color. Skull with heavier rostrum and mandible than in 

 the typical subspecies. 



Fur. — The fur is dense and soft, that on the middle of back about 

 9 mm. in length. It is composed almost exclusively of soft hairs of 

 uniform length, though a few longer ones are interspersed, especially 

 on flanks. There are no bristles. 



Color. — As in true Mzis tullbergi there are two color phases, char- 

 acterized respectively by the predominance of red and brown. In the 

 type (brown phase) the sides, cheeks, and flanks are yellowish wood- 

 brown, slightly sprinkled with dark-tipped hairs. These hairs become 

 more numerous on back, where they form a fairly well defined seal- 

 brown dorsal area, faintly intermixed with color of sides. The seal- 

 brown is clearest and darkest behind shoulders, between and in front 

 of which it is much lightened by wood-brown. Face like back, but 

 sprinkled with gray. Ventral surface dull white, sharply defined, the 

 plumbeous bases of the hairs appearing irregularly at the surface. Feet 

 Proc. Wash. Acad. Sci., December 1900. 



