MACACUS. 73 



or a nearly allied species from Siam, with the tail longer than the body, whereas in 

 the rhesus-like Macaques the tail rarely exceeds one-half the length of the trunk, 

 and when it does, it is only to a very limited extent, as I have never observed a single 

 instance in which it ever equalled three-quarters the length of the body. 



When Dr. Sclater described M. rheso-similis, he considered it to be most nearly 

 allied to M. rhesus and M. radiatus, and he then stated that Mr. Blyth had suggested 

 that it might even be a hybrid between these species ; but when Dr. Sclater had 

 read my description of the Sunderbund monkey, he recognised in it the adult 

 of M. rheso-similis, while Blyth surmised that the Sunderbund form was the long 

 unknown M. assamensis, M'Clelland, so that the views which have been here stated 

 with regard to the affinities of these monkeys is in no way novel ; they have, however, 

 been arrived at after an independent consideration of the various typical specimens. 



To determine with exactitude the essential characters of this Himalo-Burman 

 race, or sub-species of rhesus-like monkey, it will be necessary to have the command 

 of a much more extensive series of specimens than it has fallen to my lot to examine ; 

 but such materials do not exist in any museum that I am aware of, and, moreover, 

 museum specimens of themselves, however extensive, will not settle the questions 

 relating to the appearance and character of the living animal in its ferine condition. 



The evidence, however, which I have adduced would seem to prove that there 

 is a monkey different from, but closely allied to, M. rhesus extending eastwards 

 from the Nepal region of the Himalaya through Assam and the north-eastern portion 

 of Bengal into the upper or hilly portion of the valley of the Irawady, and that this 

 monkey is probably the Macacus assamensis, M'Clelland. 



*Macacus cvnomolgtjs, Linn. 



Ze Macaque, BufFon, Hist. Nat. vol. siv. 1766, p. 190; Daubenton, ibid, p. 194, pi. xx. (animal), 



pi. xxiv. (skeleton) ; F. Guv. Hist. Nat. des Mammif. Fev. 1819, Pis. 30 and 31. 

 The Philippine Monkey, Pennant, Syn. Mam. 1771, p. 121; Hist. Quad. vol. i. 3rd ed. 1793, 



p. 213; Is. Geoff. St.-Hil. Arch, du Mus. vol. ii. 1843, p. 568, pi. v. 

 Simia cynomolgus, Lin. Syst. Nat. 12™"- ed. vol. i. 1766, p. 38; Sehreber, Saugeth. vol. i, 1775, 



p. 91, pi. xiii (fig. Buffon) ; Gmelin, Lin. Syst. Nat. 13"<'- ed. 1788, p. 31; Cuv. Eeg. An. 



vol. i. 1817, p. 109; Hugues, Storia Nat. delle Soimiifi ; Tav. xxvi. 1823-24 (Buffon's fig. 



enlarged); Fischer, Syn. Mam. 1829, p. 25. 

 Cercopithecus cynomolgus, Erxleben, Syst. Reg. Animal, 1777, p. 28 ; Zimm. Geograph. Geseh. 



vol. ii. 1780, p. 186 ; Boddaert, Elench. Animal, 1785, p. 58 ; Kuhl. Beitr. zur Zool. 1820, p. 16 ; 



Mliller und Schlegel, Verhandl. 1839-44, p. 48; Cantor, Journ. As. Soc. vol. xv. 1846, p. 176. 

 Cynocephalus cynomolgus, Latr. Hist. Nat. de Buffon (Sonnini) vol. xxxvi. 1809, p. 292. 

 Cercocebus cynomolgus, Geoff. St.-Hil. Ann. du Mus. vol. xix. (1813), p. 99. 

 Fithecus cynomolgus, Desmarest, Nouv. Diet. d'Hist. Nat. vol. xviii. 1817, p. 323. 

 Macacus cynomolgus, F. Cuv. Hist. Nat. des Mammif. Fev. 1819, Pis. 30 and 31; Desmarest, 



Mamm. 1820, p. 65 ; Nouv. Diet, des Sc. Nat. vol. xxvii. 1823, p. 467 ; Lesson, Man. de Mam. 



1827, p. 42 ; Griffith, An. Kingd. vol. v. 1827, p. 17 ; Cuvier, Reg. An. 1829, vol. i. (nouv.ed.), 



p. 95 ; Fischer, Syn. Mam. 1829, p. 25 ; Is. Geoff. St.-Hil. Zool. du Voy. de Bdlanger, 



1834, p. 56 ; Waterhouse, Cat. Mam. Mus. Zool. See. Lond. 1838 (2nd ed.) p. 7 ; Lesson, 



K 



