^m4^] ALLEN — MAMMALS 51 



Flying squirrel, occurs in the timbered country. 



Ground squirrel, a species was common on the tundras at the 

 mouth of the Kolyma River. 



Marmot, occurs in the hilly timbered regions, and is much 

 pursued for its fur. 



Beaver, occurs along the tributaries of the Kolyma. ^ 



Moose, found sparingly throughout the district. 



Red deer, said to be found in the upper Kolyma valley. 



Wild reindeer, abundant. 



Mountain sheep, said to occur in the upper Kolyma mountains. 



The only previous report on mammals from this region appears 

 to be that above cited, by Dr. J. A. Allen. 



The list of species brought back by Mr. Keren follows. 



Sorex araneus ultimus subsp. nov. Kolyma Shrew. 



Type, skin and skull, no. 15,000, M. C. Z., adult male, from Nijni 

 Kolymsk, near the mouth of the Kolyma River, northeastern Siberia, 

 collected November 6, 1911, by Johan Koren. 



Ge?ieral characters. — A small race of S. araneus, with a tendency to lose 

 the tricolor pattern through the paling out of the lateral band. Skull as in 

 S. a. borealis, but with smaller brain-case. 



Description. — The type in winter pelage is a rich chocolate brown above 

 — very nearly 'Mars brown' of Ridgway, 1912. This color extends from 

 the muzzle just below the eye and ear and thence along the sides of the body 

 high up and above the forearm. A fairly sharp line of demarcation sepa- 

 rates this area from the sides and under surface of the body, including the 

 fore legs and upper lips, aU of which are white faintly washed with 'pale 

 buff,' the sides hardly clearer than the belly. Tail well clothed with 

 delicate hairs, sharply bicolor, on its dorsal surface colored like the back, 

 but silvery white below, with a w-ell-developed terminal pencil of brown 

 hairs. Feet silvery, with a dusky cast in certain lights. Fur of the back 

 7.5 mm. long. 



A topotype (M. C. Z., 15,076), taken October 20, is short-furred, and 

 apparently has not yet assumed the winter pelage. In this specimen the 

 sides are much more buffy, though not at all of the rich hue of European 

 araneus. Compared with summer specimens of S. a. borealis from the 

 Altai Mountains, the Siberian species is much less yellow on the sides, 

 and the tail is more sharply bicolor. 



