NO. 1976. TREESHREW8: FAMILY TUPAIID^—LYON. 137 



Light areas beside the dorsal stripe duller and darker, more ochraceous; 

 condylo-basal length 53 mm. or less. 

 Size slightly smaller; reddish color duller; underside of tail lighter; 

 shoulder stripe buff, well marked. 



Sirhassen Island, T. tana sirhassenensis, p. 142. 

 Size slightly larger; reddish color brighter; underside of tail darker; 

 shoulder stripe ochraceous; rather poorly developed. 



Tuangku Island, T. tana tuancus, p. 145. 



TANA TANA (Raffles). 

 (Synonymy, type-specimens, etc., under the subspecies.) 



Geographic distribution. — Borneo, Sumatra, and adjacent small 

 islands. See Nos. 3, 4, 5, 6, 1, and 8 on map on page 143. 



Diagnosis. — General color of sides and shoulder region hazel; lower 

 back with an area distinctly darker than rest of upper parts, but 

 sometimes presenting a distinct but rather small black patch; shoul- 

 der stripe bordered above and below by the hazel of the sides; size 

 large. 



Color. — Sides of body and shoulder region and outer side of legs, 

 hazel, somewhat brighter than Ridgway's, and more or less lined with 

 blackish annulations of the hairs, especially posteriorly, where the 

 darker color gradually spreads upward to concentrate itself in a dark 

 area on the lower back, which sometimes appears as a small distinct 

 black patch, dorsal stripe beginning faintly at occiput but becoming 

 very distinct over shoulders, blackish reddish brown, and gradually 

 losing itself m with the dark area of lower back; dorsal stripe bor- 

 dered on either side by a light area sometimes poorly and sometimes 

 well defined, made up of a rather coarse grizzling of cream buff (when 

 light area is well marked) or ochraceous buff (when light area is less 

 conspicuous) and blackish brown; top and sides of head and neck 

 generally like the light areas on each side of dorsal stripe, but rather 

 lighter and the grizzling finer; underparts, including inner side of 

 legs, orange rufous to ferruginous; feet generally a dull and often 

 darker extension of the color of the outer side of legs; tail above, bright 

 hazel or ferruginous, more or less, and irregularly suffused wdth 

 blackish; underside of tail similar to upper side for its outer half, but 

 the inner portion orange rufous; shoulder stripe well marked and of 

 the same general colors as light area on each side of dorsal stripe, but 

 lighter in tint. 



SlcuU and teeth. — There are no apparent characters by which the 

 skull and teeth of Tana tana may be distinguished from other species 

 of equal size. 



Measurements. — Usual measurements of adults: Head and body, 

 200-230 mm.; tail, 160-190; hind foot, 45-50; cond^dobasal lengtli, 

 53-60; zygomatic width, 25-28; width of brain case, 20-22; maxillary 

 tooth row, 20-22. 



Subspecies. — The following geographic forms may be recognized: 

 Tana tana tajia, Sumatra, southern Borneo; T. t. utara, northern 



