ALLEN: MAMMALIA. 233 
color. Below, the color is grayish washed with buff, particularly on the throat 
and mid-ventral line. The tail is colored a mixture of black and raw umber 
with a narrow buff border and a black tip. 
Collector’s measurements:— total length, 248; tail, 107; hind foot, 33. 
The skull measures:— greatest length, 38.5; basal length, 30; palatal length, 
17; zygomatic breadth, 21; interorbital constriction, 12.5; mastoid breadth, 
16.6; mandible from condyle to tip of incisor, 25; upper molar row (excluding 
p®), 6.9; lower molar row, 7. 
Bonhote (1900, p. 52) in his synopsis of the squirrels of the macclellandi 
group considers this a subspecies, though Trouessart in his ‘‘Catalogus”’ retains 
it as a species. 
ScIURUS CASTANEOVENTRIS BONHOTEI Robinson & Wroughton. 
A series of eight specimens collected at the extreme western border of 
Szechwan, at altitudes of from 10,000 to 13,000 feet, in Nachuka and Ramala 
Pass, probably represents this newly described race. It seems closely related to 
Sciurus castaneoventris of the southeast coast of China in the province of Fukien. 
In his original description of that species Gray states that ‘‘the ears are gray.”’ 
The strikingly orange-rufous ears of our series together with the pale dorsal 
coloration seem te characterize it distinctly, although in their brief diagnosis, 
Robinson and Wroughton make no comparison with other races. 
Matschie (1908, p. 210) has shown that the squirrel described by Hilzheimer 
(1905) as Sciwrus tsingtauensis is really the same as S. c. ningpoensis for it since 
appears that the skin on which it was based came from the hills near Ningpo, 
instead of from Tsingtau, to the north, as supposed. 
Six adults were measured in the flesh by the collector as follows:— 
Total. 
No. Locality. Length. Tail. Hind Foot. 
7826 Ramala Pass 405 200 55 
7828 Type Nachuka 405 185 53 
7829 Nachuka 407 195 53 
7830 Nachuka 417 185 53 
7832 Ramala Pass 390 184 53 
7833 Nachuka 390 170 54 
Average 402 186 53 
The skull of the type measures:— greatest length, 51.8 mm.; basal length, 
43.8; palatal length, 24.5; zygomatic breadth, 30.5; interorbital constriction, 
17.6; mastoid breadth, 22.9; upper diastema, 11.5; mandible from condyle 
to tip of incisor, 35.5; upper molar row, 10.2; lower molar row, 10. 
