248 FIELD COLUMBIAN MUSEUM ZOOLOGY, VOL. i. 



the querulous chirp uttered everywhere by the species at lower 

 levels. Excepting this call, there was nothing in either their 

 habits or appearance that was different between individuals from 

 separate localities. 



This animal did not enter a trap readily, and many we procured 

 were shot. 



Forty-four examples: McDonald's Ranch, Elwah River, i; 

 Boulder Creek, 13; Happy Lake, 38; Boulder Lake, 2. 



3. Tamias caurinus. 



Tamias caurinus. Merr. Proc. Acad. Nat. Scien., Phil., 1898, 



P- 352. 



This species is only found among the higher ranges of the 

 mountains. We first met with it at Happy Lake, about 5,000 

 feet of altitude, but in the Solduck valley I think it goes some- 

 what lower. It could not be called abundant anywhere and was 

 much less often met with than was the preceding species lower 

 down the mountains. The adults were shy and very difficult to 

 trap, and to obtain them we were obliged to rely mainly on the 

 gun, but the young were trapped easily. While resembling T. 

 amcenus, Allen, from California, it also is very close to T. affinus, 

 Allen, from British Columbia, differing, however in the darker 

 color of the head, wider central black stripes, and duller inter- 

 mediate stripes on the back. The rump also is not a clear grey. 



Fifty-three specimens: Happy Lake, 50; Boulder, 3. 



4. Arctomys olympus. 



Arctomys olympus. Merr. Proc. Acad. Nat. Scien. Phil., 



l8 9 8 > P- 352. 



This marmot is found in the higher altitudes of the Olympics, 

 and was first seen by us between four and five thousand feet 

 above the sea. It is especially plentiful on Mount Angeles, 

 and is met with in small colonies throughout the range traversed 

 by us. As soon as any intruder is sighted, the loud, shrill 

 whistle of some sentinel perched upon a commanding rock is 

 heard startling the lively echoes, and, if in summer, his yellow 

 body discloses his whereabouts, as he sits upon his haunches, 

 watching the unwelcome visitor. The sound this species utters 

 is exceedingly shrill and piercing, and gives to it the common 

 name of "whistler," and it often misleads one wandering among 

 the cliffs, who imagines that some companion is calling to him, 

 rather than that so powerful a whistle should be emitted by 

 any small mammal. This species is small only by comparison, 

 but is large for a marmot, som2 spscimens W3ighin? as much 



