8o MILLER 



the lower blackish brown, the upper buff. Each is about lo mm. in 

 width, though this is variable. The tail at extreme base, both above 

 and below, is colored like back. On both surfaces the grizzle soon 

 becomes much more coarse, giving way near middle below and at 

 extreme lip above to clear rufous slightly darker than that of belly. 

 Whiskers black. 



Skull and teeth. — The skull and teeth do not differ appreciably 

 from those of the Singapore form. 



Measurements. — External measurements of type : total length 38 1 ; 

 head and body 203; tail vertebrae 177; pencil 50; hind foot 50 (46). 

 Average of ten specimens from the type locality: total length 391 

 (38 1 -41 3) ; head and body 205 (197-216) ; tail vertebrae 1S5 (165- 

 197); hind foot 49.2 (48-51.6); hind foot without claws 45.7 (45- 



Remarks. — The peculiarities of this race of the plantain squirrel 

 were noted as long ago as 1S86 by Thomas, who says : " . . . . one is 

 struck by the greater prevalence and greater intensity of the red colour 

 of the belly in the northern Malay specimens as compai-ed with the 

 southern ones .... red bellied specimens have in all cases red-tip- 

 ped tails, while white and yellow-bellied ones have the tip annulated 

 like the rest of the tail."^ This exactly states the differences between 

 the races inhabiting Trong and Singapore, though the rich tawny 

 ochraceous underparts of the latter would hardly lead one to call the 

 animal " yellow-bellied." The extent of the clear red on the under 

 surface of the tail is somewhat variable ; occasionally this color is con- 

 fined to the pencil. 



SCIURUS TENUIS SURDUS subsp. nov. 



Type. — Adult male (skin and skull) no. S4412 United States Na- 

 tional Museum, Trong, Lower Siam, February 3, 1897- 



Characters. — Similar to the typical form of Sciurus tenuis Hors- 

 field from Singapore, but color paler and duller throughout ; flanks 

 and shoulders with scarcely a trace of the ochraceous wash so notice- 

 able in topotypes of S. tefiuis. 



Color. — Dorsal surface almost precisely as in Sc/urus notatus 

 miniatus.1 except that the colors are more closely blended owing* to 

 the greater extent of the light icings on the individual hairs and their 

 less sharp demarkation from the black. Shoulders, flanks, and outer 

 surface of legs just perceptibly tinged with dull ochraceous. Sides 



' Proc. Zool. Soc. London, 1SS6, p. 77. 



