452 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 



Color, etc. — ^The color of Rattus fremens tuancus is essentially like 

 that of R. fremens mansalaris; the number of scales on tail and ar- 

 rangement of hairs are essentially the same in the two forms, but in 

 each the tail is darker than it is in R. fremens fremens. 



Skull and teeth. — Skull is large, slender in appearance, the rostrum 

 particularly so, and the angle on the temporal ridge less conspicuous 

 than it is in Rattus fremens mansalaris. 



Measurements. — Type: Head and body, 257 mm.; tail, 328; hind- 

 foot, 47; condylobasal length, 53; zygomatic mdth, 26.5; width of 

 brain-case, 19.5; maxillary toothrow, 10.5. Tail has about the same 

 absolute length as that of Rattus fremens fremens, and is slightly 

 longer than that of R. fremens mansalaris, being about 325 mm. in- 

 stead of 300 mm. 



RemarJcs. — The two forms just described were recognized as con- 

 stituting a heterogenous group by Mr. Miller (1903a) who said of 

 them: "This series shows variation in both size and color." 



Order PRIMATES. 



Family LASIOPYGIDAE. 



PITHECUS MANSALARIS, new species. 



1903. Macacus " cynomolgus" Miller, Proc. U. S. Nat. Mus., vol. 26, p. 476, 

 February 3, 1903. 



Type-specimen. — No. 114560, U.S.N.M., skin and skull of adult 

 male, collected on Mansalar Island, March 10, 1902, by Dr. W. L. 

 Abbott; original number 1639. 



Geographic distribution. — Mansalar Island. 



Diagnostic characters. — A geographic form of Pithecus fascicularis, 

 of the same general plan of coloration except that the upper part of 

 head, neck, and body are of a general bright amber brown color and 

 upperpart of tail is shghtly darker. 



STcull and teeth. — These show no distmguishing features. 



Measurements. — Type: Head and body, 440 mm.; tail, 500; hind- 

 foot, 125; condylobasal length, 88.5; braincase width, 55 ; postorbital 

 constriction, 39.5; maxillary toothrow, 34.2; weight, llf pounds (5.1 

 kilos). 



Specimens examined. — Three from Mansalar Island, two skins with 

 skulls and one skull without skin. One of the skuis is without tail; 

 "Tail shot off." W. L. A. 



Remarlcs. — ^The bright coloration of Pithecus mansalaris is quite 

 striking when compared with the specimens from Tapanuli Bay, only 

 a few miles distant. 



