65 



18. Cervus Canadensis. Elk. More or less common in 

 the mountains bordering the valley. Mr. Mecham has seen them as 

 far south as the Mexican boundary, and speaks of having met with 

 droves of two thousand individuals in southern New Mexico. 



1O. Cervus macrotis. Mule Deer. Common at favorable 

 localities. 



2O. Cervus leiiciirus. White-tailed Deer. Found in the 

 valleys, but less plentiful than the preceding. 



21. Jaculus Hiidsoiiius. Common. 



22. TKua musciiliis. House Mouse. Common. Lives 

 chiefly in the houses, but also frequents the fields. It arrived here 

 many years since, but neither M. rattus nor M. decumanus seems to 

 have yet appeared. 



23. Hesperomys leucopus, var. sonoriensis. White- 

 footed Mouse. Abundant. 



24. Heotoma cinerea. Wood Rat. Common. 

 Another wood rat (JV. Mexicana?}, with the tail hairy only at the 



base, is said by Mr. Mecham to occur two or three hundred miles 

 farther south. 



25. Arvicola - 1 A large dark-colored Arvicola, of the size 

 of A. riparius, is represented as common. 



2G. Fiber zibctliicus. Muskrat. Common in the Great 

 Salt Lake Valley and ranges five or six hundred miles farther south. 



27. TlBoniomy * mfescens ? The mounds of a species of 

 Thomomys are common, but I had no opportunity of examining speci- 

 mens of the animal. 



28. Castor fiber. Beaver. Common at favorable localities. 



29. Sciiirus Hudsonfus, var. Fremonti. Fremont's 

 Squirrel. Common everywhere in the pineries. Said to be the exact 

 counterpart of the eastern red squirrel in notes and habits. I could 

 learn of the occurrence of no other species of Sciurus in this region. 



