NO. 1976. TREESHREW8: FAMILY TUPAIID^—LYON. 97 



Diagnosis. — A very distinct species of Twpaia at once characterized 

 by a narrow black dorsal line, and distichously bushy rufescent tail; 

 manunse, 2-2 = 4. 



Color. — Type: Upper parts of head, neck, and body anterior to 

 rump a grizzle of blackish and ochraceous, with a very distinct narrow 

 dorsal blackish line extending from region of neck to rump, the 

 grizzling very coarse in the dorsal region; toward rump and base of 

 tail, ochraceous color gradually replaced by ferruginous ; tail a mixture 

 of ferruginous and blackish, the two colors about equally mixed on 

 basal half of tail above, the ferruginous predominating distally and 

 below, except on outer edge, which is Uke upper surface; underparts 

 including inner side of legs, dull buff to ochraceous buff; outer side of 

 legs similar to adjacent parts of body, and feet similar in color to outer 

 side of legs; shoulder stripe, well marked, dull ochraceous. The speci- 

 mens from Mount Dulit, Mount Kulalong, and Balingean are slightly 

 darker than the others, with the dorsal stripe less distinct; under- 

 parts are of a distinctly darker ochraceous about the neck and chest, 

 and a grizzle of ochraceous or tawny ochraceous and blackish on rest 

 of underparts and inner side of legs; the feet are blackish brown, per- 

 haps due to a preservative, as they have an unnatural look. Two 

 adults from Mount Mulu have the yellowish grizzling of the back, very 

 coarse and conspicuous; the feet are of the usual yellowish brown 

 color. 



Slcull and teeth. — The skull has about the same general build as that 

 of T. montana, but lacks the above downward compression at base of 

 rostrum, and approaches the skull of T. glis ferruginea in size; the 

 bullse are relatively larger than they are in T. montana or T. g. 

 ferruginea. The brain case is relatively wide like that of r.montona. The 

 zygomatic perforation is slightly smaller than it is in T. glis ferruginea 

 The upper molar teeth are not so quadrate in outline as they are in T. 

 montana and show no essential differences from the teeth of T. glis 

 ferruginea. (Plate 9, fig. 3.) 



Measurements. — Type: Head and body, 195 mm. (from dried skin); 

 tail, 155 (from dried skin); hind foot, 45; condylobasal length, 47.5; 

 zygomatic width, 26; width of brain case, 19.5; maxillary toothrow, 

 18.5. Measurements of the series do not depart materially from 

 those of the type. See table, page 98. 



RemarJcs. — Twpaia picta is a very distinct species and needs no com- 

 parison with any other. It is quite in a class by itself and appears 

 to have no near relatives. The superficial external resemblance to the 

 long-snouted treeshrews, Tana tana is very interesting ; both have the 

 same distichously bushy ferruginous tails, both have a narrow 

 black dorsal stripe, bordered on either side by lighter grizzled areas. 

 The dorsal stripe, however, is very short in Tana and a careful 

 80459°— Proc.N.M.vol.45— 13 7 



