190S.] 



MAMMALS. 



249 



Compared with a series of winter skins of Microsorex lioy'i from 

 Elk River. Minnesota, specimens in corresponding pelage from Fort 

 Simpson and Fort Franklin are slightly grayer above. Beneath they 

 are grayish white, lacking entirely the rusty tinge of lioyi. I am 

 unable to comj)are the summer pelages, the series of lioyi being- 

 deficient in this res]3ect. 



The skull of J/, eximius differs from that of lioyi mainly in the 

 fchape of the brain case, which is more inflated in the former. In 

 eximius, also, the unicuspids are more crowded, with the result that 

 the minute third and fifth, especially the former, are scarcely visible 

 when the crowns are viewed. 



The side glands of Microsorex are very conspicuous, occtipying p 

 space about 9 mm. in length, or nearly the length of the hind foot, 

 being relatively larger than in any other shrew examined, and are 

 covered with short stiff' hair of a silvery color. They are conspicuous 

 in all the males in our series taken in the stniimer months. 



A Microsorex taken on Mtiskeg Creek, Alberta, a tribtitary of 

 Smoky River, September 2G, 1896, by J. Alden Loring, is in the Bio- 

 logical Survey collection. It closely resembles skins of Microsorex 

 eximius in winter pelage. Its skull, however, can not be found and 

 the specimen is therefore only provisionally referred to the present 

 species. 



An adult male from Fort Chipewyan measured : Total length 90, 

 tail vertebrae 30, hind foot 10; five specimens of both sexes from Fort 

 Smith average 92, 30.4, 102 ; one from Fort Simpson measured 85, 30, 

 10; one from Fort Franklin, 92, 34. 10. 



In the museum collection of alcoholic shrews I find 4 specimens of 

 this species from Fort Resolution, one taken in December, 1862, by 

 James Lockhart. the others collected about the same time by A. 

 McKenzie. Another (Xo. 59621), labeled Great Slave Lake, and col- 

 lected by John Reid, was in all probability taken at Big Island. Its 

 skull is the smallest of the series. The skull of another (Xo. 59624) 

 from Cumberland district, Saskatchewan, taken by MacFarlane, 

 closely resembles that of M. hoyi^ and the specimen is perhaps prop- 

 erly referable to that species. 



The type of Microsorex alnorum. described by me, from Robinson 

 Portage, Keewatin, still remains unique, none of the large series now 

 before me equaling it in the size of the skull, especially the brain 

 case, or in the length of the hind foot. 



Myotis Iticifug'us (Le Conte). Little Brown Bat. 



A small bat which was dislodged from the loose bark of a poplar 

 stub near our camp 10 miles below the mouth of the Peace on June T, 

 1901, was probably of this species. It darted into the adjacent forest 

 and could not be found. With the exception of one or two seen on 



