2 



TAHAN EXPEDITION. 



2. HYLOBATES LAS (Lixx.). 



Homo lar, Linn. Mantissa, App. p. 521 (1771). 



Hylobates lar (Liun.) ; Blanf. Ma mm ., p. 7; Flower, op. cit., p. 312. 



a. /.ad. Kuala Teku, Tahan River, Pahang. 500 ft. 7th August, 1905. 



b. m.juv. (son of nbove). 



The adult specimen is of a uniform pale brownish-yellow, having 

 the white ring round the face extremely clear and well marked. The 

 young is of a uniform dark brown, with pale rump, breast, vent, hands 

 and feet, the lighter colour extending for some way up the inside of the 

 arms. The ring round the face is white, this colour extending back 

 on the neck and cheeks to a little behind the ear. 



[Both this species, the iva-wa or ungha puteh, and the preceding, 

 the siamang, were common on the lower slopes of Gunong Tahan, 

 extending up to a height of about 3,000 ft. They were, however, 

 extremely wary and, owing to the steep slopes and broken nature of the 

 country, very difficult to approach. Their cries were constantly heard 

 in the early morning and were readily distinguishable, that of the 

 siamang being much more sonorous and staccato. — H. C. R.] 



8. PRESBYTES OBSCURUS (Reid). 



Seinnopithecus obscurus, Reid, P.Z.S., 1837, p. 14 ; Blanf. 

 Mamm., p. 41 ; Flower, op. cit., p. 317. 



Presbytes obscurus (Eeid); Bonh., Fascic. Malay Zool., i., p. 5 (1903). 



a. /.ad. Kuala Teku, Tahan River, Pahang. 500 ft, 7th August, 1905. 



b. juv. (young of above). 



c. „ Kuala Teku, Tahan River, Pahang. 500 ft. 31st July, 1905. 



d. m.ad. Kuala Tembeling, Pahang River. 200ft, 25th August, 1905. 



^The young are of an uniform pale orange colour throughout, the 

 tip of the tail being slightly darker. In the older of the two the 

 hands are dark brown as in the adult and the fulvous hairs are thickly 

 interspersed with dark brown ones as far up as the elbows ; there are 

 also a few dark hairs over the face. 



[On Gunong Tahan the lotong was found in troops of seven or eight 

 to an altitude of about 2,000 ft. and was decidedly shy. At Kuala 

 Tembeling, on the other hand, in the vicinity of Malay villages, it was 

 remarkably tame and could be approached without difficulty. — H. C. R.] 



4. PRESBYTES FEMORALIS (Martin). 

 Seinnopithecus femoralis, Martin, CharlestvortJis Mag. Nat. Hist., 

 ii., p. 436 (1838) ; Flower, op. cit., p. 318. 



Presbytes femoralis (Martin) ; Bonh., op. cit., p. 7. 



a. m.ad. Kuala Tembeling, Pahang River. 200 ft. 25th August, 1905. 



b. /. „ „ „ „ 20th August, 1905. 



These two individuals are very similar, but the female is rather 

 darker in colour, while the male is much greyer and approaches the 

 so-called " albocinereus " type. 



