204 FIELD MUSEUM or NATURAL HISTORY ZOOLOGY, VOL. X. 



and a railroad station where we succeeded in obtaining rooms. As it 

 was a meal station we were able to get very good food indeed. We 

 hunted mostly from mule back but had considerable difficulty in getting 

 fresh mules as the climbing was exceedingly hard on them, and it 

 seemed to be against the principles of the owners to feed them any 

 more than what they were able to pick up for themselves, the con- 

 sequence being that after a mule had been ridden for a couple of days 

 it became so exhausted it was worthless to us. 



"The gait of the guanaco is a canter or easy lope, and by bounds 

 they attain great speed. Reddish brown on back and lighter under 

 parts. Cool gray tone of head and ears; head held erect. Neigh of 

 horse, neck of camel, feet of deer, and swiftness of the devil. The call 

 is a weird, tremulous sound and half idiotic neigh." 



Sciurus aestuans gilvigularis Wagner. SQUIRREL. 



Four specimens (skins only), Santarem, Brazil. Collected by G. K. 

 Cherrie. 



Sciurus* ignitus Gray. SQUIRREL. 



One specimen, Roquefalda, Bolivia, collected February 19. 



This specimen is provisionally regarded as representing the species 

 described by Gray in 1867 from a squirrel taken in "Bolivia" by 

 Bridges. It agrees with the original description and disagrees with 

 specimens previously referred to this species in at least four respects: 

 (i) in its relatively soft full pelage, (2) in its dark chestnut ears and 

 postauricular spots, (3) in its white or whitish chin and throat, and (4) 

 in its whitish under parts more or less grizzled and washed with buffy. 

 I am not informed as to whether or not Gray's type is still preserved, 

 but without examination of it, the probability that it belongs to this 

 species rather than to the one to which the name ochrescens has been 

 applied seems very great. 



Sciurus irroratus ochrescens Thomas. SQUIRREL. 



One specimen, Chapare River, below Todos Santos. 



This is obviously an example of the form described by Thomas as 

 Sciurus cuscinus ochrescens which Allenf has identified with Gray's 

 Macroxus ignitus. It does not agree with Gray's description, however, 

 for the under parts are entirely ochraceous and it does not have the 



*Without more study than I am at present able to give, I do not feel justified 

 in using the generic terms recently proposed by J. A. Allen in his Review of South 

 American Sciuridae. His position seems very radical, and it is doubtful if the same 

 standards could be applied successfully in other groups. 



tBull. Am. Mus. Nat. Hist., XXXIV, pp. 204-206, May, 1915. 



