NO. 1976. TREESHREW8: FAMILY TUPAIID.^—LYON. 141 



TANA TANA BESARA, new subspecies. 



Type-locality. — Opposite Pulo Jambii, below Tyan, on north or 

 right bank of Kapuas River, western Borneo.^ 



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

 142247, skin and skull of adult male, collected opposite Pulo Jambu, 

 Kapuas River, on the north or right bank of the river, September 17, 

 1905, by Dr. W. L. Abbott; original number, 4458; skin and skull 

 in good condition. (See figures 10 and 11 on page 135.) 



Geographic distribution. — Known only from the type-locality, but 

 probably found throughout the low swampy area of western Borneo, 

 north of the Kapuas River.^ See No. 4 on map on page 143. 



Diagnosis. — Similar in general coloration to Tana tana tana of 

 southern Borneo, but even darker and duller in color and with con- 

 siderably more black on the lower back, forming a fairly well-defined 

 black patch, underparts darker and duller; size very large; hind 

 foot, 53 mm.; condylo-basal length, 59.5. 



Slcull and teeth. — Aside from their distinctly larger size these do not 

 differ from those of the related subspecies. (Plate 11, fig. 8.) 



Measurements. — Type, the only adult specimen know^n: Head and 

 body, 229 mm.; tail, 196; hind foot, 53; condylo-basal length, 59.5; 

 zygomatic width, 29 ; width of brain case, 21 ; maxillary tooth row, 23. 



RemarJcs. — This subspecies is at once distinguished from the others 

 by its large size and dull color. Its distribution would appear to be 

 coincident with that of Sciurus horneoensis palustris,"^ and like that 

 squirrel its color appears darker than it does in related subspecies. 

 Doctor Abbott in his field catalogue refers to the large size of this 

 treeshrew. It has hitherto been caUed by me Tupaia speciosa.^ 



Specimens examined. — Two, the type, and a young mdividual from 

 near Tyan. 



TANA TANA UTARA, new subspecies. 



Type-locality. — Thi'ee thousand feet on Mount Dulit, Baram dis- 

 trict, northern Borneo. 



Type-specimen. — In British Museum, Reg. No. 99.12.9.5, skin and 

 skuU of adult male, collected October, 1898, at 3,000 feet altitude on 

 Mount Dulit, Borneo, by Charles Hose; in good condition. 



Geographic distribution. — Northern Borneo, probably confined to 

 the more elevated regions. See No. 3 on map on page 143. 



Diagnosis. — A bright-colored subspecies of Tana tana, with sides, 

 shoulder, and underparts lighter, and the light areas on either side of 

 the dorsal stripe very light and gray in appearance, black area on 

 back better defined. 



1 Proc. U. S. Nat. Mus., vol. 33, map opposite p. 547, Dec. 24, 1907. 



! Idem, p. 553, Dec. 24, 1907. 



'Idem, p. 562, Dec. 24, 1907, and vol. 40, p. 121, Apr. 2o, 1911 



