98 Proceedings of the Biological Society of Washington. 



to the darker species of chrysocomtis, and the extreme norvegicus-\\ke first 

 molar. The species is one of the pecuhar forms apparently restricted to 

 the higher mountains of Middle Celebes. 



Rattus punicans, sp. nov. 



Type from Pinedapa, Middle Celebes. No. 219,625, U. S. National 

 Museum; skin and skull of adult 9 (teeth little worn); collected February 

 7, 1918, by H. C. Raven; original number 3501. 



Diagnosis. — A rather large, reddish brown rat, not referable to any of the 

 recognized species-groups. Pelage comparatively short and scant, inclined 

 to be wavy, and without spinous hairs. Upperparts and sides chestnut or 

 rich reddish brown, the longer hairs tipped with black ; underfur and bases 

 of all hairs light slate or brownish gray (a much older individual has the 

 hairs of rump, lower back, and sides uniform reddish brown to bases). 

 Underparts ochraceous, the bases of hairs pale grayish. Hands and feet 

 brown. Tail shorter than head and body, uniform blackish brown, thinly 

 haired. 



Skull resembling in general characters skulls of Rattus dominator, but 

 with antorbital plate extending still farther forward; bony palate not 

 extending back of posterior plane of last molars; and incisors orthodont. 

 Pattern of molar teeth essentially as in Rattus celebensis, but anterior 

 lamina of m* with outer tubercle so reduced as to be practically absent 

 (outer tubercles of second and third lamina; well developed). 



Measurements. — Type, and a much older female, with teeth much worn, 

 measurements of the latter in parentheses: Head and body, 185 (207); 

 tail, 156 (185); hind foot with claws (dry), 45 (47); hind foot without claws 

 (dry), 42.5 (43.5) ; ear from notch, dry, 17.4 (19.6). Skull of type: Greatest 

 length, 46.0; condylobasal length, 41.5; palatal length, 22.8; mastoid 

 breadth, 18.3; interorbital breadth, 6.4; mandible, 26.5; maxillary toothrow, 

 alveoli, 8.9; mandibular toothrow, alveoli, 8.8. 



Specimens examined. — Two from the type locality. 



Remarks. — -Externally this rat is distinguished from other Celebesian 

 species by its rich chestnut brown coloration. It is possibly related to 

 Rattus celebensis, but differs conspicuously from that species, not only in 

 color, but by its short, blackish tail, without white tip; the extended 

 antorbital plate ; and the peculiar structure of the first upper molar. 



Sciurus murinus necopinus, subsp. nov. 



Type from Goenoeng Lehio (southwest from Lake Lindoe), Middle 

 Celebes. No. 218,712, U. S. National Museum; skin and skull of adult cf 

 (teeth moderately worn); collected January 20, 1917, by H. C. Raven; 

 original number 3107. 



Diagnosis. — Like Sciurus murinus murinus Miiller and Schlegel, from 

 Menado, North Celebes, but skull with decidedly smaller auditory bullae. 



Measurements. — Type: Head and body, 105 mm.; tail, 107; hind-foot, 

 29. Skull of type: Greatest length, 32.9; condylobasal length, 28.1; 

 zygomatic breadth, 19.4; interorbital breadth, 11.8; mandible, 18.5; 

 maxillary toothrow, 6.0. 



