NO. 21 FIFTY-ONE NEW MALAYAN MAMMALS — MILLEB -'5 



morel from Tenasserim the island race is distinguishable by the 

 slender rostrum, a character difficult to describe but readily appre- 

 ciable to the eye. 



RATUFA MELANOPEPLA PENINSULJE, new subspecies 



Type. — Adult male (skin and skeleton). No. 83478, United States 

 National Museum. Collected at Lay Song Hong, Trong, Lower 

 Siam, September 23, 1896, by Dr. W. L. Abbott. 



Diagnosis. — Larger than Ratufa melanopepla melanopepla of 

 Telibon Island, Trong, the skull with auditory bullae normal in size, 

 not reduced as in the island form. 



Measurements. — Type: head and body, 400 ± ; tail, 420 ± ; con- 

 dylobasal length of skull (teeth moderately worn), 67.O (63.1) ;* 

 zygomatic breadth, 45.2 (44.3); interorbital breadth, 21). 5 (28.2); 

 nasal. 27,.^ (23.4); diastema, 17.4 (15. 1) ; length of inflated 

 portion of auditory bulla, 14.9 (13.3) ; mandible, 47.0 (41.6) ; max- 

 illary toothrow (alveoli), 13.9 (14.0); mandibular toothrow (al- 

 veoli), 14.8 (14.4). 



Specimens examined. — Seven, from the following localities: main- 

 land of Trong, no exact locality, 1 ; Lay Song Hong, Trong, 2 ; Ty 

 Ching, Trong, 2 ; Rumpin River, Pahang, 2. 



Remarks. — Examination of the original records shows that the 

 type and three other specimens of Ratufa melanopepla were collected 

 on Telibon Island, not on the mainland of Trong. The four speci- 

 mens from the island differ so noticeably from those taken on the 

 neighboring mainland that it is necessary to recognize two races. 

 From Trong to the southern limit of the group R. melanopepla pen- 

 insula: appears to be very constant in its characters. Whether or 

 not in the region north of Trong it intergrades with R. plneopepla 

 is not indicated by the material that I have seen. 



RATUFA PH.&OPEPLA, new species 



Type. — Adult male (skin and skull), No. 124235, United States 

 National Museum. Collected at Sungei Balik, Tenasserim, February 

 25, 1904, by Dr. W. L. Abbott. Original No. 3141. 



Diagnosis. — Like Ratufa melanopepla peuinsuhe but larger (hind 

 foot without claws 80 to 89 mm. instead of 71 to 83 nun., greatest 

 length of skull in individuals with distinctly worn teeth 74 to 78 mm. 



1 Measurements in parenthesis are those of the type of R. melanopepla me- 

 lanopepla, also a male with moderately worn teeth. 



