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 3 ), 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 to 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 Sciurus 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: 



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. 



