1911] Taylor: Mammals of the 1909 Nevada Expedition. 211 



Antilocapra americana (Ord). 



American Prong-horned Antelope. 



Mr. F. M. Payne of Quinn River Crossing reported antelope 

 as still seen from time to time between the Crossing and Big 

 Creek Ranch. On Jnly 18 two antelope were seen by Miss 

 Alexander and Miss Kellogg in Little High Rock Caiion, Washoe 

 County. According to all reports antelope are much more 

 numerous in the vicinity of Table IMountain and the low ranges 

 to the west than in the immediate vicinity of the Pine Forest 

 Range. Our party found no evidence of their presence. 



Marmota flaviventer (Aud. and Bach.) (?) 

 Yellow-bellied Woodchuck. 



The onl.y evidence obtained of the presence of this animal was 

 the discovery of a mandible (no. 7890) of some species of the 

 genus at an elevation of 8000 feet near the head of Big Creek. 

 The specimen is the left mandible of an adult: There are two 

 teeth yet remaining, the incisor and first premolar. 



In size the mandible is in most respects intermediate between 

 two jaws of flaviventer at hand (belonging to specimens 7050 

 and 7051, Univ. Calif. Mus. Vert. Zool.). No. 7050 belonged to 

 a young animal, while no. 7051 shows marks of age in its den- 

 tition and in the development of its processes, ridges, and fossae. 

 The jaw from Nevada is practically between the two in all its 

 characters, and does not vary to any noticeable degree away 

 from them. The woodchuck from which this jaw came was prob- 

 ably a relatively young adult. Although the positive determina- 

 tion of its status is hardly possible with the material at hand, it 

 may be concluded with a reasonable degree of assurance that it 

 represents flaviventer or some closely allied form. 



It should be mentioned in this connection that another species 

 of woodchuck has been described from the Great Basin, namely 

 Marmota engelhardti Allen, type locality Briggs Meadows (alti- 

 tude 10,000 feet), Beaver Range Mountains, Utah. No measure- 

 ments of the mandible are given in the description. Possibly this 

 species from northern Nevada will be found to be nearly related 

 to engelhardti. 



