1924] Swarth: Birds and Mammals of the Skeena River Region 373 



GENERAL ACCOUNTS OF THE MAMMALS 

 Sorex personatus personatus T. Geoflfroy. Masked Shrew 



Six specimens collected (nos. 32526, 32528-32530, 32543, 32552), 

 three from Hazelton and three from Kispiox Valley. A female taken 

 at Hazelton on June 7 contained nine embryos. 



For identification of the three species of shrews collected, I am 

 indebted to Dr. Hartley H. T. Jackson of the United States Biological 

 Survey. 



Sorex obscurus obscurus Merriam. Dusky Shrew 



Twenty-two specimens from Hazelton (nos. 32527, 32531-32542, 

 32544r-32551, 32788), six from Kispiox Valley (nos. 32553-32558), 

 and eleven from Nine-mile Mountain (nos. 32559-32569). According 

 to Jackson there are some specimens from each locality that show an 

 approach to Sorex setosus EUiot in cranial characters. 



On Nine-mile Mountain shrews were trapped on a steep slope just 

 above timber line (4500 to 5000 feet altitude), in dense growths of 

 veratrum, lupine, and grass. 



Microsorex eximius (Osgood). Osgood Shrew 



A specirden of Microsorex (no. 32570) that was collected near 

 Hazelton on June 8 has been provisionally identified by Jackson as 

 M. eximius. It measures in millimeters as follows: total length, 88; 

 tail vertebrae, 28 ; hind foot, 10. 



Myotis longicrus longicrus (True). Northwestern Long-legged Bat 



Two specimens collected, one at Hazelton, June 18 (no. 32571), and 

 one in Kispiox Valley, July 9 (no. 32572). The Hazelton specimen 

 was found, freshly killed, on the ground under a telephone line. At 

 that point the wire was strung through timber and not easily seen 

 amid the trees, but even so it is noteworthy that this bat should have 

 collided with it. The wire had struck the upper part of the breast 

 and had cut through to the spine; the animal was all but cut in two. 



The Kispiox Valley specimen was dislodged from a crack in the 

 trunk of a dead poplar, felled for firewood. The first few blows of 



