). 1317. 



MAMMALS OF NORTHWEST SUMATRA— MILLER. 



461 



Measurements of Mus snrdus. 



Locality. 



malur Island 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do.; 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



114181 

 114182 

 114183 

 rt 114184 

 114185 

 114186 

 114187 

 114190 

 114191 

 114192 

 114193 

 114194 

 114196 

 114198 

 114200 

 114201 

 114188 

 114189 

 114195 

 114197 

 114199 



Male adult . . . 



do 



....do 



do 



....do 



....do 



....do 



do 



do 



do 



do 



do 



do 



do 



do 



do 



Female adult 



do 



do 



do 



do 



Hind 

 foot 



with- 

 out 



claws. 



mm. 

 25 

 25 

 24 

 26.4 

 26 

 25 

 25 

 26 

 25 

 27 

 26 

 26.4 

 26 

 24.4 

 26 

 27 

 25 

 25 

 25 

 26 

 25 



" Type. 



MUS FIRMUS Miller. 



1902. 3rus Jirvnts Millek, Proc. Acad. Nat. Sci. Philadelphia, 1902, p. 155; 

 June 11, 1902; Linga Island, off east coast of Sumatra. 



An immatui'e rat taken at Tapanuli Bay, S specimens (1 in alcohol) 

 rom Pulo Tuangku, and 7 (1 skull without skin) from Pulo Bang- 

 aru I can not distinguish satisfactorily^ from the Ifusjirmus of Linga 

 sland. The skins from Pulo Bangkaru and that from Tapanuli Bay 

 re practically indistinguishable from the original series. Those from 

 *ulo Tuangku are, however, not as clear buff beneath, as the hairs of 

 he lateral portions of the belly have distinct gray bases, and this color 

 ppears slightly at surface. The series is too small to prove that this 

 itference is constant. For measurements see table, page 462. 



MUS DOMITOR, new species. 



Ti/pe.—Adu\t female (skin and skull). Cat. No. 114621, U.S.N.M. 

 Collected on Pulo Mansalar at entrance to Tapanuli Bay, Sumatra, 

 riarch 4, 19U2, by Dr. W. L. Abbott. Original number, 1592. 



Charaeters.^SimWsLY to llns Jlrmm but under parts so little tinged 

 rith yellow as to form no marked contrast with color of sides. Mam- 

 iise S, as in Iliis firmus and related species. 



Fur and general external features. — The external characters, other 

 han color, are so like those of Mux fnnus, Mus inte(jei\ and the 

 )reYiously known members of the group as to need no description. 



Color. — Upper parts a fine grizzle of blackish brown and pale, dull, 

 mff, the two colors nearly equally mixed on the back, l)ut the buff in 

 xcess on the sides, where, however, it is clouded by the appearance 



