NO. 14 NEW MAMMALS FROM SIBERIA— HOLLISTEE 



Remarks. — Pallas described his Lepus alp in us from the Altai and 

 Kolywan region, east to Kamchatka. The eastern forms have long 

 since been separated, and inasmuch as two apparently distinct species 

 are found in the region between Kolywan and the Mongolian border, 

 it becomes necessary to further restrict the type locality of alpina. 

 The animal described and figured by Pallas, and later by Waterhouse, 

 is unquestionably the northern, large skulled form, represented in 

 the United States National Museum by a single specimen from 

 Barnaul. The pikas from the higher Altais to the southward are 

 smaller, with much smaller skulls ; and differ conspicuously in general 

 color, without the striking black inner ear of the northern form. 

 It seems necessary, therefore, to restrict the type locality of alpina to 

 the Kolywan and Barnaul region, where the species doubtless inhabits 

 the outlying ranges of the northern Altai, and to provide a name for 

 the pika of the Little Altai to the southeast. True alpina may range 

 to that higher part of the Altai system to the southwest of the region 

 inhabited by nitida, 1 but the uniform series of thirty-one specimens 

 taken by us in the Tchegan-Burgazi Pass near the Mongolian border 

 and in the forested mountains near Tapucha, would seem to indicate 

 that nitida is the only species found in this general region. Pikas of 

 the very different dauurica and lad ace 11 sis groups have been described 

 by Thomas from a comparatively short distance to the southeast, 

 on the Mongolian side of the range. 



MUSTELA LYMANI, sp. nov. 



Type from Tapucha, Altai Mountains, Siberia. No. 175198, 

 United States National Museum; skin and skull ; adult J 1 . Collected 

 August 10, 1912, by N. Hollister. Orig. No. 4494. 



General characters. — A stoat related to Mustela erminea, but with 

 summer pelage very much paler, the reddish-brown color entirely 

 wanting; no white spot behind eye; underparts with only the faintest 

 tinge of very pale yellow ; tail long. 



Color of type, summer pelage. — Upperparts, including arms above 

 to wrist, and legs above to middle of foot, Isabella color ; slightly 

 darker on head and center of back ; no white spot behind eye and ear 

 only faintly rimmed with lighter color. Hands above from wrist, 

 and terminal half of feet above huffy-white. Anterior half of tail 



1 There are probably no pikas in the immediate vicinity of Kolywan and 

 Barnaul, the country being much too flat. I he specimens probably came 

 from some one of the outlying ranges of the Altai back from the Obi and 

 northward from the "Little Altai ", the type locality of nitida. 



