PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXVI. 



456 



Remarks. ^Whi\e Sciunts ithericolori^ darker beneath than in either 

 of the two i-elated forms, its upper parts are not as dark as in S. satur- 

 atus and the tail is much less suffused with black. The reduction of 

 the pale lateral stripe easily distinguishes it from its allies. 



Measurements of squirrels of the Sciurus notatus group. 



Sciuriis albescens. . . 



Do 



Do 



Do 



Do 



Do 



Sciurus vittatus 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Sciurus saturatus . . 



Do 



Do 



Do 



Do 



Sciurus ubericolor . 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Sciurus preliosus. . 



Do 



Do. 



Do 



Do 



Do 



Do 



Do 



Locality. 



i Nximber. 



LohSidohBay.. 



....do 



....do 



....do 



....do 



....do 



TaiianuHBay... 



do 



do 



do 



do 



do 



do 



do 



do 



PuloMansalar.. 



do 



do 



do 



do 



Pulo Tuangku . . 



do 



do 



do 



do 



do 



do 



do 



.....do.. 



Pulo Bangkaru . 



do 



do 



do 



do 



do 



do 



do 



114154 

 114155 

 114157 

 114158 

 114156 

 114159 

 114518 

 114522 

 114623 

 114524 

 114525 

 114526 

 114519 

 114.520 

 114521 

 114627 

 114628 

 « 114629 

 114630 

 •114631 

 114366 

 114367 

 114369 

 114371 

 114368 

 114370 

 114372 

 a 114373 

 114374 

 114318 

 114320 

 114321 

 114322 

 114323 

 114324 

 114319 

 u 114325 



Total 

 length. 



Male adult... 



do 



do 



do 



Female adult 



do 



do 



do 



do 



do 



do 



do 



Male adult 



do 



do 



do 



do 



Female adult. 



do 



do 



Male adult 



... .do 



do 



....do 



Female young 



Female adult. 



....do 



....do 



do 



Male adult — 



do 



do 



do 



do 



do 



Female adult. 



do 



mm. 

 343 

 350 

 390 

 370 

 350 

 373 

 405 

 397 

 398 

 390 

 385 

 380 

 393 

 395 

 380 

 411 

 400 

 400 

 390 

 375 

 382 

 400 

 375 

 395 

 310 

 345 



6 415 

 410 

 415 

 375 

 400 

 372 

 390 



<• 335 

 400 

 400 

 375 



Head 

 and 

 body. 



mm. 

 193 

 190 

 200 

 195 

 170 

 203 

 220 

 200 

 206 

 190 

 205 

 215 

 208 

 210 

 200 

 221 

 220 

 215 

 200 

 185 

 207 

 220 

 205 

 210 

 175 

 225 



&205 

 215 



, 225 

 205 

 205 

 192 

 210 

 210 

 215 

 220 

 200 



Tail. 



Hind 

 foot. 



mm. 

 150 

 160 

 190 

 175 

 180 

 170 

 185 

 197 

 192 

 200 

 180 

 165 1 

 185 

 185 

 180 

 190 

 180 

 185 

 190 

 190 

 175 

 ISO 

 170 

 185 

 135 

 <'120 

 ?)210 

 195 

 190 

 170 

 195 

 180 

 180 

 <• 126 

 185 

 180 

 175 



mm. 

 46 

 45 

 47 

 46 

 46 

 47 

 48 

 50 

 47 

 48 

 48 

 48 

 48 

 50 

 48 

 52 

 51 

 61 

 62 

 51 

 48 

 60 

 46 

 50 

 47 

 49 

 50 

 61 

 61 

 48 

 48 

 47 

 47 

 48 

 48 

 49 

 46 



Hind 

 foot 



with- 

 out 



claws. 



mm. 

 42 



41.4 I 

 44 . 

 42 

 42 



43.4 1 

 45 

 47 

 43 

 45 

 45 

 45 

 46 

 47 

 44 

 48.4 

 48 

 47 

 49 

 47.4 

 45 

 47 

 43 

 46 

 39 

 45 

 46 

 48 

 47 

 46 

 45 

 44 

 43 

 45 

 44.4 

 45 

 43 



a Type. 



b Estimated from dry skin. 



SCIURUS EREBUS, new species. 



■ Tail injured. 



Ty^e.— Adult female (skin and skull). Cat. No. 114537, U.S.N.M. 

 Collected at Tapanuli Bay, northwestern Sumatra, March IT, 1902, by 

 Dr. W. L. Abbott. Original number, 1053. 



Characters. — Similar to the Bornean Sciurus pluto Gray, but larger, 

 red area on legs more extensive, and pale lateral stripe completely 

 obliterated. 



Color. — Under parts and inner surface of limbs bright chestnut 

 (lighter and more rod than that of Ridgway); elsewhere glossy ])lack. 

 On cheeks, feet, and outer surface of front legs the black is slightly 

 grizzled with whitish and red, and along flanks and thighs a few hairs 

 bear a single whitish annulation rather less than 1 mm. in length, but 

 these markings are lost in the general black effect, except on very 



