452 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



Characters. — Very similar to Sckiriis mansaJaris, but brown of upper 

 parts more tinged with yellow and gray of underparts distinctly 

 washed with whitish cream buff. 



3feasure?nents. — In size this animal closely agrees with Sciurus man- 

 salaris, as shown by the table of measurements, page 452. 



Specimms examined.— Ten, all from the type locality. 



ReniarliS. — The characters which distinguish this squirrel from its 

 relative of Pulo Mansalar are so strictly comparative that it is impos- 

 sible to state them in such a manner as to insure positive identification 

 of single specimens. Comparison of the eight skins of one form with 

 the ten of the other shows, however, that the slight differences are 

 remarkably constant, so nmcli so that, with the exception of a single 

 specimen from each series, there is no difficulty in assigning every skin 

 to its pi'()]xn" place. 



SCIURUS TENUIS Horsfield. 



1824. SciuruK tenids IIoksfield, Zoological researches in Ja\a and tln^ neighliour- 

 ing islands (pages not numbered); Singapore. 



Five skins from Tapanuli Bay, Sumatra. They are in all respects 

 typical, and show no approach to Sckirus mansalaris and S. Ixincarus. 

 For measurements see table, page 452. 



Measuremeniis of Sciurus bancarus, S. viansalaris, and S. tenuis. 



Name. 



Sciurus bancarus . . . 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Sciuru.'i mansalaris . 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



fiCiurus toiuis 



Do 



Do 



Do 



Do 



Locality. 



Pulo Bangkaru. 



do 



do 



.....do 



do 



do 



do 



do 



do 



do 



Pulo Mansalar.. 



do 



do 



do 



do 



do 



do 



do 



Tapanuli Bay .. 



do 



do 



do 



do 



Number. 



114308 

 114309 



a 114311 

 114312 

 114313 

 114315 

 114310 

 114314 

 114316 

 114317 

 114632 



"114633 

 114634 

 114636 

 114637 

 11463.5 

 114638 

 114639 

 114542 

 114545 

 114543 

 114544 

 114546 



Male, adult . . 



....do 



....do 



....do 



....do 



....do 



Female, adult 



....do 



....do 



....do 



Male, adult .. 



....do 



....do 



....do 



....do 



Female, adult 



...-do 



--..do 



Male, adult... 



....do 



Female, adult 



....do 



....do 



Total 

 length. 



mm. 

 262 

 266 

 260 

 265 

 267 

 255 

 264 



■ 275 

 253 

 265 

 245 

 255 

 270 

 260 

 255 

 245 

 278 

 263 

 255 

 235 

 255 

 220 

 235 



Head 



and 



body. 



mm. 

 150 

 160 

 145 

 145 

 142 

 162 

 155 

 150 

 139 

 145 

 147 

 140 

 148 

 1.50 

 145 

 135 

 158 

 150 

 140 

 120 

 140 

 117 

 125 



Tail. 



mm. 

 112 

 106 

 115 

 120 

 125 



93 

 109 

 125 

 114 

 120 



98 

 115 

 122 

 110 

 110 

 110 

 120 

 113 

 115 

 115 

 315 

 103 

 110 



Hind 

 foot. 



mm. 

 36 

 36 

 37 

 35 

 37 

 35 

 35 

 37 

 35 

 36 

 38 

 37 

 36 

 36 

 38 

 "36 

 38 

 37 

 35 

 34 

 36 

 34 

 36 



Hind 

 foot 



with- 

 out 



claws. 



mm. 

 32 

 32 

 34 

 32.5 

 34 

 32 

 32 

 34 

 32 



33 - 

 35 

 36 

 33 

 33 

 35 

 33 

 35 

 34 

 32 

 31.4 

 33 

 32 

 33 



"Type. 



SCIURUS ALBESCENS (Bonhote). 



1901. Sciurus notatus albescens Bonhote, Ann. and Mag. Nat. Hist., 7th ser., YII, 

 May, 1901, p. 446; Acheen, Sumatra. 



Six specimens from Loh Sidoh Bay, practically topotypes of the 

 species. For measurements see table, page 456. 



