586 PROCEEDINGS OF THE NATIONAL MUSEUM. voi 



Diagnostic characters. — Like Ratufa ephij^plum from Borneo, but 

 with a distinctly gni}^ or dirt^'-white head, sides more grizzled and 

 less reddish. 



Color. — Tj'pe: Upper surface of neck, bod\', and the sides a griz- 

 zle of ochraceous (a little lighter than that of Ridgway) and black, 

 the latter predominating in the median line and forming an ill-detined 

 broad streak on the lower back, the ochraceous predominating about 

 the shoulder and anterior half of the sides, the two colors about 

 equally mixed along the posterior half of the sides. Lower throat, 

 underparts of body, inner side of legs, ochraceous. Nose, cheeks, 

 insides of ears, and extreme upper part of throat dirty white or 

 cream-])uff'; top of head a grizzle of black and cream-])uti'; side of neck 

 for about 10 mm. posterior to ear rather light ochraceous, devoid of 

 black grizzling, extending upward to outer surface of ear, where it 

 becomes bufly. Fringe on outer surface of forearm tawny; fore 

 feet dull ochraceous; outside of foreleg similar to sides of body, inner 

 side ochraceous. Hind feet ochraceous; lower leg and thigh a dark 

 or almost tawny ochraceous, the upper and outer surface of the thigh 

 being encroached on by the grizzling of the sides of the bod3^ Upper 

 surface of tail dark brown, something between Ridgway's bui'nt umber 

 and seal brown, almost black at the extreme tip; underside of tail 

 similar for outer half of hairs, inner half of hairs dull ochraceous, the 

 short appressed hairs clear ochraceous. 



SI'kU and teeth. — These closely resemble those of specimens of 

 Hatufa ephippium from western Borneo. 



Measnre))ients. — Type: Head and body, 315 mm.; tail vertebra?, 

 337; hind foot, 79 (71). Skull of type: Upper length, 64.0; basal length, 

 53.6; basilar length, 50.2; palatal length, 29.1; condylo-basal length, 

 57.8; zygomatic breadth. 41.1; interorbital constriction, 27.6; con- 

 striction Ix'hind postorbital processes, 21.8; diastema, 15.5; maxillary 

 tooth row (alveoli), 13.5; mandible, back of condyle to front of 9,yra- 

 ph3^sis, 41.2; mandibular tooth row (alveoli), 12.7. For measurements 

 of the sei;jes see table, page 589. 



Specimens examined. — Thirteen; see table, page 589. 



JReriiarl's. — None of the series examined show any marked deviation 

 in color from the type. The amount of Avhite or gray on the head is 

 subject to some variation, being more extensive on the top of the 

 head in some individuals than in others. In Cat. Nos. 124932 and 

 124974, U.S.N.M., the tawn3'-ochraceous of the hind legs is replaced 

 by a sort of dull ochraceous. Only one of the specimens, Cat. No. 

 125008, U.S.N.M., is in old worn pelage; the black of its upper parts 

 has been bleached to a dull brown, or brownish black. Some of the 

 other specimens have the tails dull brownish black. On holding- 

 Cat. No. 124975, U.S.N.M., an immature female, in certain lights 

 there can be made out 13 indistinct rings in the tail caused by narrow 



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