01 



JIiniDX 



20. Willis nilisculus. House Mouse. Abundant in the houses, 

 from which it drives the native vesper mice. 



21. Hesporom;* » loucopiis, var. sonoriensis Coues' 

 MS. White-footed Mouse. Abu .dant. 



22. Scotoma cincrca. Wood Rat. "Mountain Rat." 

 Common. 



23. Fiber zibctUicus. Muskrat. Common. 



Geo»yid.e. 



2-4. Tliomoniys rufc§cens. Fort Union Gopher. Com- 

 mon. 



Castobidje. 



25. Castor fiber. Beaver. Abundant. 



SC'IURIDJE. 



SO. Taniias lateralis. (Spermophilus lateralis Baird.) 

 Say's Striped Squirrel: Said to be common. 



JM. Tamias qiiadi'STittatus. Missouri Striped Squirrel. 

 Abundant. 



28. S2»ernioi»nilus Richardsoni. Tawny Gopher. 



Hystricidje, 



20. Hrethizon dorsatus, var. ei»izantlius. Porcu- 

 pine. Common in the timber. 



Lepokidje. 

 3t>. Kiepus cailll>est ris. Prairie Hare. More or less com- 

 mon everywhere, but exceedingly abundant at certain localities. 



31. Xepias solvations, var. arfcniisia. Sage Rabbit. 

 Very numerous everywhere. 



32. Lepus Ameilcanus, var. Ruirdii. A rabbit which 

 is white in winter occurs in the timber in considerable abundance, 

 and is doubtless the Lepits Bairdii Ilayden. 



PART IV. 



On the Mammals of Great Salt Lake Valley, Utah. 



The following notes are based mainly on information kindly commu- 

 nicated to me by Mr. E. 1) Mectiam, of Ogden, Utah. Mr. Mecham 

 was formerly an agent of the American Fur Company, and has spent 

 twenty years as a trapper, hunter and guide in the Rocky Mountains. 

 His expeditions have extended from the Saskatchewan on the north 



