66 



30. Sciuropterus volucclla. Flying Squirrel. Common. 



31. Tamias lateralis. Say's Striped Squirrel. Common. 



32. Tamias qtiatlrivHtatiis. Missouri Striped Squirrel. 

 Common. 



33. Spermopliilus Harris!. Harris's Striped Squirrel. 

 Abundant. 



34. Spermopliiliis grammuriis. A second and larger 

 species of Spermophilus is also represented as abundant. This is un- 

 doubtedly S. grammurus, specimens of which, collected in this vicin- 

 ity have been brought in by Dr. Hayden's parties. 



35. Cynomys Columbian us. (C. Gunnisoni Baird.) 

 Short-tailed Prairie Dog. According to Mr. Mecham, this animal is 

 found as far west as the Sierra Nevada Mountains, but is not of 

 common occurrence in Sail Lake Valley. Smaller than C. Ludovici- 

 anus, and unfit for food ; the other is regarded as excellent eating. 

 The C. ColumUanus , lives in more desert regions and feeds so much 

 upon the different species of Artemisia as to be thoroughly impreg- 

 nated with their peculiar flavor. 



3O. Arctomys flaviventer. Yellow-footed Marmot. Com- 

 mon in the higher parts of the mountains, living among the rocks. 



37. Krctliizon dorsatus, var. epizanthus. Porcu- 

 pine. Not common. Kanges southward to the headwaters of the 

 Arkansas, Eed, Gila and Del Norte rivers. Much smaller and lighter 

 colored southward. 



38. iLagromys princeps. Little Chief Hare. Under the 

 name of "Mountain Rat," this species is well known to Mr. Mecham, 

 who has often met with it, both to the northward and southward, 

 near the tops of the higher snow-capped peaks of the Rocky Moun- 

 tain Ranges. He described to me the animal and its habits so accu- 

 rately as to leave its identity beyond question. 



30. T^epus callotis. Jackass Rabbit. Common. 



40. JLepus campestris.. Prairie Hare. Common. 



41. JLepus sylvaticus, var. artemisia. Common. 

 4fc. iLepu* Americaniis, var. If airdii? In addition to 



the three species of Lepus above named, of which we obtained speci- 

 mens, a fourth was described to me as inhabiting the higher parts of 

 the mountains. It is probably the L. Bairdii Hayden and is said (per- 

 haps erroneously) to remain white the whole year. 



