CASTOEIDjE 97 



vertebras 355 (14); hind foot 185 (7.25); bare part of tail 

 about 125 (4.90) wide, by 290 (11.40) long. Weight 40 to 60 

 pounds; female smaller. 



Type locality, San Pedro River, near Monument 98 on the 

 Arizona- Sonora boundary line. 



Broad-tailed Beavers are found in the interior southwestern 

 United States and northern Mexico^ from Sonora to Montana. 

 Those found in eastern California along the Colorado River are 

 of this subspecies. 



In February and March, 1903, I saw signs of Beavers along 

 the banks of the Colorado River a few miles below old Port 

 Yuma, but failed to get any in the traps which I set for them. 

 They were few in number, probably only a pair, and seemed to 

 choose a new place to come out on the bank each night. I found 

 very few trees cut, these being mostly small willow saplings. 

 The principal "signs" were at small, but dense, thickets of cane 

 that grow here and there along the banks, and I saw some canes 

 that had been cut. Beaver are known to live in suitable places 

 all along the Colorado River, but they are trapped so persistently 

 that they do not get a chance tO' become plentiful. 



Castor canadensis pacificus Rhoads. 



PACIFIC BEAVER. 



Underf ur of upper surface of body and head seal brown ; 

 overhair glossy reddish chestnut, almost concealing the under- 

 fur along the back; underfur of belly drab gray at roots and over- 

 hair broccoli brown ; fore legs and feet dark wood brown ; hind 

 feet seal brown ; ears black. 



Length of type specimen (a female) 1145 mm. (45 in- 

 ches) ; tail vertebra 330 (14) ; hind foot 185 (7.25) ; bare part 

 of tail 122 (4.80) wide by 295 (11.60) long. 



Type locality. Lake Kichelos, Washington. 



Pacific slope from Alaska to central California east to ind 

 including the Sierra Nevada and Cascade Mountains. I sa\^ 



