no. 1757. NEW PHILIPPINE MAMMALS MILLER. 399 



Measurements. -Type: Head and body, 209 mm.; tail, 241; hind 

 foot (dry), 13.4; skull, condylobasal length, 48.0; zygomatic breadth, 

 24.8; intiM orbit al const rid ion. 7.1 : breadth of brain case over roots of 

 zygomata, 19.0; depth of brain case at middle. 14.6; nasal, 20.4; dias- 

 tema, It.!': mandible. 31.2; maxillary toothrow (alveoli), 9.6; man- 

 dibular toothrow (alveoli), 9. 1. 



Specimens examined. Two, the type and a half-grown individual, 

 both from the Alag River. 



TRYPHOMYS, new genus Muridse). 



Type. Tryphomys adustus, new specie 



Characters. External form murine, the tail about as long as body 

 without head: hind foot with outer digits so reduced that neither 

 extends beyond level of base of three median digits; fur of back 

 coarse and harsh, the tips of the shorter hail's tending to curve for- 

 ward, giving the pelage a peculiar scorched aspect; skull father short 

 and broad, with widely spreading zygomata and unusually large 

 antorbital foramina: outer alveolar wall swollen into a noticeable 

 protuberance al level of /// ; ; bony palate terminating in a broad median 

 ridge bounded l>\ lateral vacuities, the resulting form superficially 

 like that of the same region in certain Microtine genera; teeth robust. 

 their structure apparently not differing widely from those of Epimys. 



TRYPHOMYS ADUSTUS, new species. 



Plate '-'a. 



Type-specimen. — Old female (skin and skull) Cat. No. 151511, 

 Q.S.N.M. Collected at I laights-in-t he-( )aks, Benguet, Luzon, July 

 26, 1907, by Dr. Edgar A. Mearns. Original number 6457. 



Diagnosis. Size medium: form robust; tail about as long as body 

 without head, coarsely and conspicuously ringed (8 rings to the (■(alti- 

 meter at middle); thumb with a small, appressed nail; sole* naked 

 throughout, the live tubercles well developed, the fifth large; inner 

 toe extending to base of three middle digits, the outer toe about to 

 middle of inner: claws well developed, those on hind foot i he largest; 

 general color coarsely grizzled yellowish brown above, bufl'v gray 

 below; tail uniform dark brown : ma in ma', p. 2-2, v. 11 , i 2-2=^ 10. 



Color. Back and sides a coarse grizzle of wood-brown and black, 

 the brown everywhere in exec--, particularly on sides, where the 

 black merely produces a slight effect of " lining:" median dorsal region 

 abruptly more grizzled than sides, the recurved hairs showing an 

 evident grayish cast in certain lights; bases of hairs slate-gray streaked 

 by the lighter gray of the xevy slender grooved bristles; head and face 

 essentially like back but with grayish cast somewhat more evident; 

 underparts and cheeks bully white dulled by the slate-gray under 



