No.l.W. MAMMALS COLLECTED IN WESTERN BORNEO— LYON. 553 



base of whiskers, but some of the nontypical forms do show small 

 whitish areas at base of whiskers. The present material indicates that 

 Sciiirns horneoenf^if^ is a very variable species. Includinsi; in the 

 species the lowland form described below, the followino; are some of 

 the more striking variations, but all sorts of intermediate conditions 

 are found between the extremes : 



Base of whiskers whitish to bright ferruginous ; cheeks and sides of 

 neck ami shoulders black with slight grizzling of whitish, to conspicu- 

 ous grizzling with buffy and reddish, to almost a clear bright ferrugi- 

 nous; area al)ovc pale lateral stripe pure black grizzled with wliite 

 or ochraceous or both in varying mixtures; feet, pure black, or 

 bright rufous or various mixtures of these, or black with slight griz- 

 zling of buffy; underparts bright rufous to a general effect of seal- 

 brown, the latter caused by a mixture of dark chestnut and l)lackish. 



SCIURUS BORNEOENSIS PALUSTRIS, new subspecies. 



Type.^MwM male, skin and skull. Cat. No. 142330, U.S.N.M. 

 Collected on the north bank of the Kapuas River, below Pulo Lim- 

 bang, western Borneo, September 22, 1905, by Dr. W. L. Abbott. 

 Original number 4467. 



Diagnostic characters. — Similar to Sciurus borneoensis horneoensis, 

 but no retl or rufous color appearing on cheeks, sides of neck, or shoul- 

 ders. 



Color. — -Top of head, top of neck for a width of about 20 mm., back 

 for a width of 25-30 mm. over shoulders, 50-60 mm. in the middle 

 portion, narrowing to 20 mm. on the riunp, base of the tail above and 

 terminal hairs of the tail above and below, black; lateral stripe, about 

 100 mm. long, extending from behind the shoulder where it is 5 mm. 

 wide, to front of thigh, where it is 15 mm. wide, and an inconspicuous 

 spot under the eye, white ; sides of neck, shoulder, outer side of upper 

 arm, side of body between the white lateral stripe and the black back, a 

 fine and ec[ual grizzle of black and white, becoming a coarse grizzle of 

 black and white, the latter color in excess, on the sides of the rump 

 above the thigh; sides of head, upper surface of feet, outer side of 

 forearm, and ears, black, finely grizzled with inconspicuous white; 

 base of whiskers and area arountl lips, buffy; underj^arts of body 

 and inner sides of legs, an equal grizzle of black and ferruginous; 

 underside of tail, between the black basal portion and the black 

 pencil, a coarse mixture of black and white. 



Variations from the type. — Some specimens have more black in the 

 underparts, so that the general effect is almost seal brown. One 

 skin from Pulo Saparo, Cat. No. 142324, U.S.N.M., and one from 

 Pulo Kanchil, Cat. No. 142319, U.S.N.M., have more extensive black 

 backs and no grizzling appears between the pure black back and the 

 white lateral stripe. The amount of light grizzling above the shoulder 

 is variable. Two skins. Cat. No. 142321, U.S.N.M., opposite Pulo 



