28 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 6l 



the difference between the two forms about as great as that between 

 P. car bo and the less dark P. obscura of the Malay Peninsula. 



.Measurements. — Type: head and body, 520 mm.; tail, 810; 

 hind foot (dry), 160 (155); condylobasal length of skull (teeth 

 moderately worn), 78.5; greatest length, 96.8; zygomatic breadth, 

 77.4; breadth of braincase, 52.8; breadth of rostrum over canines, 

 30.0; mandible, 70.6; maxillary toothrow exclusive of incisors, 33.3; 

 mandibular toothrow exclusive of incisors, 39.2. 



Specimens examined. — Two, both from Pulo Langkawi. 



PRESBYTIS AUSTRALIS, new species 



Type. — Adult male (skin and skull), No. 1 12709, United States 

 National Museum. Collected at Jambu Luang, east coast of Johore, 

 July 31, 1901, by Dr. W. L. Abbott. Original No. 1196. 



Diagnosis. — Like Presbytis femoralis of Singapore Island but 

 size not reduced, the greatest length of skull about 95 mm. as usual 

 in Peninsular, Sumatran and Bornean members of the group. 



Measurements. — Type: head and body, 465 mm.; tail, 730; hind 

 foot (dry), 160 (160) ; condylobasal length of skull (basal suture 

 closed, m : slightly worn), 72.2 (66.3) ;* greatest length, 94.1 (88.3) ; 

 zygomatic breadth, 74.2 (66.8) ; breadth of braincase, 57.2 (51.3) ; 

 breadth of rostrum over canines, 26.7 (26.3) ; mandible, 65.6 (60.6) ; 

 maxillary toothrow exclusive of incisors, 30.3 (29.7) ; mandibular 

 toothrow exclusive of incisors, 33.5 (33.3). 



Specimens examined. — Five, from the following localities: Rum- 

 pin River, Pahang, 1 ; Jambu Luang, Johore, I ; Sembrong River, Jo- 

 hore, 3. 



Remarks. — The material in the United States National Museum 

 shows that the Malay Peninsula is inhabited by three forms of the 

 Presbytis fenwralis group: (a) the very dark keatii at the north 

 (specimens from southern Tenasserim), (b) the less dark australis ; 

 thighs showing a slight though evident grizzle on outer side ; and (c) 

 the small true femoralis of Singapore Island, indistinguishable from 

 australis except by size. In the original description of Presbytis 

 femoralis, 2 supposed to equal the "Simla mauraf" of Raffles, the 

 type-locality is said to be " Sumatra, etc." As the carefully written 

 account of the animal's color is not appropriate to any of the known 



Cranial measurements in parenthesis are those of a male topotype (No. 

 86897) of P. femoralis with m 3 slightly worn. 



- (838. S[emnopithecus] femoralis Martin, Charlesworth's Mag. Nat. Hist., 

 vol. 2, p. 436. August, 1838. 



