560 Life-histories of Northern Animals 



marks a smell-gland. These peculiarities of colour, with its 

 very short tail, make a sufficient label for field-work. (See d 

 in Plate XXXIX.) 



Two races are recognized: 



horealis RiCH., the typical form as above. 

 dalli Merriam, lighter coloured and redder. 



Life-history. 



RANGE Richardson found the species in abundance at Great Bear 



Lake.^ Preble secured specimens near Fort Rae^ at Echi- 

 mamish River and at Norway House.^ It is almost certainly 

 therefore a species ranging in northern Manitoba. 



HABIT The Bog-lemmings frequent the cold sphagnum bogs of 



the far north. They are shy, secretive and nocturnal. Hither- 

 to their habits have escaped almost all observation. 



One of Preble's Echimamish River specimens, taken 

 June 25th, contained 6 embryos. 



«F. B. A., 1829, I, p. 127. 



' Proc. Bi. Soc. Wash., Aug. 6, 1902, p. 181. 



* N. A. F. No. 22, 1902, p. 54. 



