miller] seventy new MALAYAN MAMMALS 53 



Speciiiiois cxaiiiiiicd. — Six, all but one from Tana Bala, the latter 

 from Ptilo Pinie. 



Remarks. — Of the six skins two, both males, are in the dark 

 pelage, one male is in the red phase, and the one female, the type, 

 is in the gray coat. The two others, both males, are in a stage 

 intermediate between the red and dark phases. Due allowance 

 being made for the three phases, the species in not unusually 

 variable in color. Specimens in the dark or red pelages 

 are very different from Galcopithccus volans, but those in the 

 gray phase might readily be mistaken for the mainland animal in 

 dark coat. But whatever the characters of the skin, the species is 

 always recognizable by the relatively slight dift'erence in the size 

 of the two sexes, and by the large anterior upper tooth. 



GALEOPITHECUS TUANCUS sp. nov. 



1901. Galcopithccus volans Miller, Proc. U. S. Nat. Mus., xxvi, p. 471, 

 February 3, 1903. Not Lemur volans Linnaeus. 



Type. — Adult female (skin and skull), No. 114,375, Unites States 

 National Museum. Collected on Pulo Tuangku, Banjak Islands, 

 Sumatra, January 22, 1902, by Dr. W. L. Abbott. Original number, 



1454- 



Characters. — Color essentially as in Galeopithecus satiiratiis, but 

 gray phase apparently lighter. Size much less than that of the 

 Batu animal. 



Color. — Light phase (type specimen) : The animal was evidently 

 moulting when killed, as two pelages are represented ; a thin, 

 abraded, grayer coat on limbs, head, neck, and sides, and a 

 fresh, more brown coat on back. The former closely resembles the 

 ordinary gray phase of Galeopithecus volans, and calls for no special 

 comment. The latter is essentially like the back in the type speci- 

 men of Galeopithecus saturatus, but the colors are not as bright and 

 well contrasted. Underparts as in the type of G. saturatus. Dark 

 phase (immature^ male, No. 114,376) : like corresponding pelage 

 of Galeopithecus saturatus, except that the back is more suffused 

 with russet, and the neck is distinctly tinged with gray. 



Skull and teeth. — The skull is much smaller than that of Galeo- 

 pithecus saturatus, that of the female closely corresponding with 

 that of the female G. aoris in size. The skull of the male, how- 

 ever, is decidedly larger than in the male G. aoris of exactly com- 

 parable age. Teeth as in Galeopithecus aoris, except that the first 



' Apparently full grown, but permanent dentition not fully in place. 



