no. 1809. MAMMALS FROM BORNEO AND VICINITY— LYON. 95 



Diagnostic characters. — A member of the ephippium group, but 

 differing from typical ephippium in having a more sharply defined 

 dorsal stripe which does not extend forward beyond the shoulders, 

 and in having a lighter cream-colored head. 



Color. — Upper parts and sides of body with exception of dorsal 

 stripe nearest Ridgway's ochraceous. This color is almost pure, 

 but on close inspection, especially with a glass, dark tips to many 

 of the hairs may be seen. The basal portions of the hairs on this 

 part of the body are blackish slate. Dorsal stripe and all of the tail 

 except in the middle line on the underside black or blackish. The 

 stripe gradually begins, due to increasing extent of dark tips of the 

 hairs, just behind the shoulders. It soon becomes prominent, vary- 

 ing in width in different specimens from about 30 to 50 mm. It 

 is continuous with the color of the tail. Top and sides of head, 

 just posterior to the ears, whitish, irregularly sprinkled with blackish 

 due to dark-colored tips to the hairs. The dark-colored tips have a 

 tendency to accumulate on the point of the nose and on the top of 

 the head just anterior to the ears. Ears concolor with head. Under- 

 parts of body and throat varying from light buff to buff-yellow. 

 Outer sides of legs and feet generally similar to sides of body, but 

 slightly lighter, inner side of legs and femoral spot similar to under- 

 parts. Middle line of underside of tail similar to underparts or 

 slightly darker. 



Skull and teeth. — There are no evident peculiarities by which the 

 skulls and teeth of R. vittata can be distinguished from those of R. 

 ephippium. 



Measurements. — For external and cranial measurements of the 

 type and series see table, page 96. 



Specimens examined. — Five, all from Saratok, Pulo Laut, south- 

 eastern Borneo. 



RATUFA VITTATULA, new species. 



Type. — Skin and skull of adult male, Cat. No. 151762, collected on 

 Pulo Sebuku, southeastern Borneo, January 2, 1908, by Dr. W. L. 

 Abbott. Original number, 5720. 



Diagnostic characters. — Practically identical with R. vittata, but 

 smaller; hind foot 78-81 mm. instead of 84-89, and greatest length 

 of skull 61-63.2 instead of 66-66.8. 



Color. — The colors of R. vittatula are identical with those of R. 

 vittata except that the light color of the head extends back on the 

 side of the neck. 



Skull and teeth. — The skulls and teeth of R. vittatula are distinctly 

 smaller than they are in R. vittata. The rostrum in the smaller 

 species is relatively shorter than it is in the larger one. 



