NO. 1485. MAMMALS FROM RHIO-LING A ISLANDS— MILLER. 2()1 



Measurements. — For measurements see table, page 262. 



Speclnwns examined. — Eight, all from Pulo Kundur. 



Remarhs. — The differences in color l)et\ycen this squirrel and Senrrus 

 melanops though slight are very constant. The Sumatran animal is 

 now represented in the U. S. National Museum by ten specimens, three 

 from the Indragiri River and seven from the Kateman. In all of these 

 without exception the shoulder is distinctly red, concolor witli outer 

 surface of upperarm, and the white stripe ends abruptly at its nar- 

 rowest region, just l)ehind shoulder. In the eight 8. enriinonen.Kl.s, 

 on the other hand, the white extends across shoulder to base of neck, 

 with merely a faint, indefinite wash of red near juncture of arm. 



SCIURUS CARIMONENSIS, new species. 



Type.— A.(\\\\t female (skin and skull). Cat. No. 122800, U.S.N.M. 

 Collected on Great Karimon Island, Rhio-Linga Archipelago, May 24, 

 1903, by Dr. W. L. Abbott. Original number, 2423. 



Characters. — A member of the prevostii group similar to Sciftrus 

 melanoj)s but smaller, shoulder less washed with red, and side of neck 

 below and behind ear grizzled gra}^ in noticeable contrast with sur- 

 rounding parts. 



Color. — The color is in general exactly like that of Sciurus eondu- 

 rensis. Shoulder mostl}^ white, but strongly washed with orange-rufous, 

 the red becoming along border of dark neck area as clear and bright 

 as that of upper arm. Face slightly more grizzled than in Sciurus 

 melanops and iS'. condurensis., but the usual whitish spots of normal 

 size and character. On side of neck below and behind ear the white 

 becomes the predominant element in the grizzle, producing a distinct, 

 though not sharply defined light area. 



Skull and teeth. — Except that they are smaller the skull and teeth 

 do not difi'er appreciably from those of Sciurus melanops and S. con- 

 durensis. 



Measurements. — For external measurements see table, page 262. 



Cranial measurements of type: Greatest length, 56 (.57) " mm. ; basal 

 length, 49 (51); basilar length, 46 (48); palatal length, 24.6 (26); dia- 

 stema, 13 (14); length of nasals, 17 (18.8); interorbital breadth, 23.4 

 (23); zygomatic breadth, 35 (34); mandible, 36.6 (38); maxillary tooth 

 row (alveoli), 11 (11); mandibular tooth row (alveoli), 10.4 (11.4). 



Specimens examined. — Fifteen (one in alcohol), all from Great 

 Karimon. 



A*d;r^r/7'>?'-s.— The characters of this form are quite as constant as those 

 of Sciurus condurensis. The color of the shoulder is almost exactly 

 intermediate between that in the two closely related species, but the 

 sliglitly smaller size, and the gray sides of the neck are sutiicientiy 

 diagnostic. These two insular species together with the Sumatran 



"Measurements in parentheses are those of the type ot Sciurus melanops. 



