314 ME. STANLEt S. FLOWER ON THE [Apr. 3, 



In reference to a quotation from a letter of mine in the P. Z. S. 

 1898, p. 924, " in Perak it (the Siamang) is found south of the 

 Perak Eiver, but not apparently anywhere north of it," Mr. A. 

 L. Butler writes to me (dated Selangor, 30.5.99) saying : " Don't 

 you get the Siamang on the (Larut) Perak Hills? I shot one large 

 male on Maxwell's Hill at 3000 ft., unless I am much mistaken. 

 I did not preserve it, as I was not then collecting monkeys. 

 Oddly enough I shot it in mistake, taking its head, which alone I 

 saw, for a black squirrel sitting bunched up. This was a very 

 large gibbon, entirely black, much bigger than Hylobates lar." 



No gibbons are found wild in the islands of Penang or Singapore, 

 though they are evidently very generally distributed over the main- 

 land ; when met with in the jungle it is very hard to identify the 

 species, and it is but little use and cruel to attempt to shoot them 

 with a shot-gun ; if a specimen be needed, kill it with a rifle-bullet. 

 In September 1897, at the foot of Gunong Pulai in Johore, I saw- 

 both black and white gibbons of apparently the same species, but 

 I cannot say which. In March 1897, near Tahkamen, Siam, there 

 were many in the high trees in the thick jungle ; their call was loud 

 and musical, " Pua, pua, pua, pua, pua, pua, pua, pua," beginning 

 slowly and gradually getting faster. One morning we followed up 

 an individual for a long time; it was a very large black gibbon, 

 extremely agile. Occasionally it progressed by running along the 

 boughs, but generally by swinging by its hands ; every now and 

 then it leaped down vertically to a great depth among the branches, 

 as if falling, but it never actually came to the ground. In the 

 forest of the Dong Phya Pai (between Ayuthia and Korat), at 

 about 900 feet elevation, I have heard gibbons making a great noise 

 in the early morning ; judging from the cry, I should say it was the 

 same species as at Tahkamen. 



In January 1898 I was shown a live black-faced white gibbon 

 at Chantaboon, said to have been caught in the neighbourhood, 

 which 1 could not identify. Consul T. ff. Carlisle, writing to me 

 from the Pailin Mines, Battambong Province, Siam, in Peb. 1899, 

 says : " I have seen lots of gibbons round here, and have heard of a 

 reddish-coloured one, but have never seen it." 



Very much remains to be done to get a definite knowledge of 

 the species, varieties, and distribution in this region of these very 

 interesting and attractive monkeys. 



Family Cekcopithecid^. 



5. Macacus assamensis McClell. The Himalayan Monkey. 



Macacus assamensis, Blanf. Faun. Ind., Mamm. p. 15. 



Blanford states there is in the British Museum a specimen, very 

 probably of this species, from the Laos country in Upper Siam. 



Distribution. Eastern Himalayas, Assam, Upper Burma, Siam 

 probably), Sandarbuns (?) 



