THE MONKEYS OF THE MACACA NEMESTRINA GROUP. 



By,^TEKKiT S. Miller, Jr., 



Assidaut Curator, Dinsioii of Maiiuiiah. 



The United estates National Museum contains seventeen skins of 

 monkeys of the Macaca"- nemestrina group, all l)ut one of them col- 

 lected and presented by Dr. W. L. Abbott. In this series are repre- 

 sented no less than live well characterized species, one each from 

 Sumatra, Borneo, the Pagi Islands, the Malay Peninsula, and Chance 

 Island, Mergui Archipelago. The specimens show no individual 

 variations worthy of special note or which tend in any way to connect 

 the different forms. The species may be distinguished as follows: 



SYNOPSIS OF THE MONKEYS OF THE MACACA NEMESTRINA GROUP. 



Hairs of back, underpartss, arms, and legs indistinctly or not aunulated; median and 



posterior area of back so dark that tiie blackisli tail forms no noticeable 



contrast; buttocks not noticeably paler than sides and thighs; canines of 



males (so far as known) excessively heavy. 



A dwarf animal with sknll of adult female (male not known) only 110 mm. in 



greatest length M. pagensis, p. 557 



Large animals with skull of female 130 mm. or more in greatest length, that of 

 adult male 140-160 mm. 

 Skull elongated, the zygomatic breadth scarcely <jr not greater than distance 

 from lower rim of orbit to most posterior point of occiput. 



M. lu'DiestriiKi, p. 556 

 Skull widened, the zygomatic breadth consideralily greater than distance from 



lower rim of or}>it to most posterior point of occiput M. hroca, p. 558 



Hairs of back, underparts, arms, and. legs distinctly aunulated; median and posterior 

 area of back so little darkened that the blackish tail forms a conspicuous 

 contrast; buttocks noticeably paler than sides and thighs; canines of males 

 not excessively heavy. 

 A noticeable contrast in length between hair of slioulders and neck and that 

 of back; least distance from orbit to gnathion scarcely greater than width of 



rostrum at base of zygomata M. insiddua, p. 560 



No noticeable contrast in length between hair of shoulders and neck and that 

 of back; least distance from orliit to gnathion conspicuously greater than 

 width of rostrum at base of zygomata . .M. adusta, p. 559 



(i Macaca Lecepede, Tabl. Mamm., 1799, p. 4. Macacus Desmarest, Mammalogie, 

 I, 1820, p. 63. 



Proceedings U. S. National Museum, Vol. XXIX— No. 1436. 



555 



