Miller and Hollister — New Murine Rodents. 71 



Diagnosis. — Larger and lighter colored than Rathis hoffmanni hoffmanni 

 or R. h. linduensis; grayer, less rufous or rich dark brown; underparts 

 lighter, with strong suffusion of pale yellowish rather than grayish drab. 

 Skull larger than in linduensis, as large as in typical hoffmanni. 



Measurements. — Type: Head and body, 195 mm; tail, 165; hind foot, 45. 

 Skull of type: Condylobasal length, 44.9; palatal length, 26.0; zygomatic 

 breadth, 20.9; mastoid breadth, 17.5; interorbital breadth, 7.4; mandible, 

 26.3; maxillary tooth row, crowns, 7.0; mandibular tooth row, crowns, 6.8. 



Specimens examined. — Six, all from southern localities in Middle Celebes: 

 Gimpoe, 3; Toware, Bada, 1; Watoetaoe, Napoe, 2. 



Remarks. — South of the region in Middle Celebes occupied by the small 

 skulled, rich colored, and long furred R. h. linduensis, is this form of hoff- 

 manni with shorter, harsher pelage; more like the t5T)ical form but with 

 much lighter, more grayish brown, coloration. It is a large animal, with large 

 hind feet. 



Rattus moUicomus, sp. nov. 



Type from Goenoeng Kalabat; altitude 6,500 feet, northeastern Celebes. 

 No. 217,752, U. S. National Museum; skin and skull of adult cf (teeth 

 considerably worn); collected April 10, 1916, by H. C. Raven; Original 

 number 2433. 



Diagnosis. — A member of the Rattus rattus group related to R. hoffmanni, 

 but with much longer, softer pelage; skull shorter and broader, with spread- 

 ing zygomata; the antorbital plates less extended forward. 



Measurements. — Type: Head and body, 187 mm.; tail, 195; hind foot, 

 40. Skull of type: Condylobasal length, 42.0; zygomatic breadth, 21.7; 

 palatal length, 23.9; interorbital breadth, 6.0; mastoid breadth, 17.5; 

 mandible, 26.7; maxillary tooth row, crowns, 8.0; mandibular tooth row, 

 crowns, 7.8. 



Specimens examined. — Twelve, all from 5,600 to 6,500 feet altitude on 

 Goenoeng Kalabat. 



Remarks. — This high mountain species is very different from Rattus 

 hoffmanni of the surrounding lowlands. There is no reason to suspect 

 intergradation with hoffmanni; and the long, soft pelage and short, broad 

 skull make R. moUicomus an easily recognized form. 



Rattus adspersus, sp. nov. 



Type from Pinedapa, Middle Celebes. No. 219,602, U. S. National 

 Museum; skin and skull of adult cf (teeth considerably worn); collected 

 January 22, 1918, by H. C. Raven; original number 3427. 



Diagnosis. — Related to Rattus chrysocomus (Hoffmann) of North Celebes, 

 but general coloration darker; the characteristic agouti-like flecking more 

 brownish, less yellowish; sides and underparts especially less yellowish. 

 Tail shorter, almost unicolbr, only very slightly lighter colored on under- 

 side near base, and without light colored tip. Skull smaller. 



Measurements. — Type: Head and body, 163; tail, 147; hind foot, 38. 

 Skull of type: Condylobasal length, 38.8; zygomatic breadth, 19.8; inter- 



