Smithsonian Report, 1949.—Ernest P. Walker PLATE 12 
aad te eae shoo Tere gree man 
tiara et 
PLAINS LEAST WEASEL (MUSTELA RIXOSA CAMPESTRIS) 
Upper and middle, in summer coat; lower, in winter coat (this form apparently 
does not become entirely white). This is a very rare form of which practically 
nothing has been recorded, and these may be the only pictures ever taken of 
it. About three-quarters natural size. 
