NO. 197G. TREE8HREW8: FAMILY TUPAIIDJE—LYO'M. 73 



TUPAIA DISCOLOR Lyon. 



1906. Titpaia discolor Lyon, Proc. U. S. Nat. Miis., vol. 31, p. 602, December 18, 

 1906. 



Type-locality. — Island of Banka, east of Sumatra. 



Type-specimen. — In United States National Museum, Cat. No. 

 124703, skin and skull of adult female, collected at Tanjong Rengsam, 

 Banka, May 24, 1904, by Dr. W. L. Abbott; original number, 3262; 

 in good condition. 



Geograpliic distribution. — Island of Banka. See No. 12 on map on 

 page 75. 



Diagnosis. — A treeshrew of the T. glis ferruginea build with the 

 general color effect of the anterior parts rather ferruginous, and the 

 posterior parts rather tawny olive, underparts ochraceous; mammas, 

 3-3 = 0. 



Color. ^U\vpev parts of head, neck, anterior half of bod}^, and outer 

 side of forelegs a fine grizzle of black, and ferruginous, the latter 

 color in excess; posterior half of upper parts, with base of tail, and 

 outer side of hind legs a fine grizzled mixture of oclu'aceous buff and 

 blackish, both colors in about equal proportions; upper surface of 

 tail a grizzle of blackish and cream color or bufi' ; the black being much 

 in excess; underparts of head, neck, and body, including inner side of 

 legSj varjdng from oclu*aceous buff to dull orange ochraceous ; under- 

 side of tail similar to upper, but the lighter color in excess along its 

 center; hands and feet blackish brown, with a very fine ochraceous 

 grizzle; shoulder stripe well developed, orange rufous. 



SlcuU and teeth. — These are distinctly of the ferruginea type, but 

 the teeth are noticeably smaller, the bullae larger, and brain case more 

 rounded and inflated. (Plate 9, fig. 4.) 



Measurements. — Type: Head and body, 220 mm.; tail, 175; hind 

 foot, 48; condylobasal length, 48.5; zygomatic width, 26; width of 

 brain case, 19; maxillary tooth row, 18.5. Except in length of tooth 

 row and width of brain case the type has measurements slightly in 

 excess of the majority of specimens. For individual measurements, 

 see table, page 78. 



Remarlcs. — Tupaia. discolor is a very distinct form, and along with 

 T. longipes of Borneo constitutes a distinct section of the genus. 

 Although clearly of the ferruginea type it is very different in coloration 

 and in number of mammae from that form. It is clearly a deriva- 

 tive of the Bornean T. longipes and has no close affinities with T. glis 

 ferruginea of Sumatra. It is described here before T. longipes be- 

 cause it is a more extrom.e development of the same type of animal. 

 Although externally showing many affinities to T. liypoclirysa of Java, 

 yet its skull shows none of the peculiarities of that species and is dis- 

 tinctly of the wide rangmg ferruginea type. 



