14 NORTH AMERICAN FAUNA.- 



promineiit postoi'bital processes and smaller autlital bulhe. Skull of 

 female very much smaller and more delicate than that of male, 

 resembling female ofcieognani, but smaller. 



Remarks. Putorivs streatori is a dark Pacific Coast form of cicognani, 

 with "which it may be found to intergrade. It differs conspicuously 

 from cicognani in the color of the under parts, the dark chocolate brown 

 of the back and sides encroaching far on the throat and usually meet- 

 ing along the median line of the belly, thus reducing the white to a 

 narrow and irregular strip, which expands on the anterior part of the 

 throat, on the breast behind the fore legs, and immediately in front of 

 the hind legs, and stops abruptly on the under surface of the thighs. 



Five winter specimens from Sumas, British Columbia, kindly loaned 

 by Mr. Outram Bangs, point toward intergradation with cicognani. In 

 three out of the five, the toes of both fore and hind feet are white, and 

 the color of the upper parts is much paler than in summer pelage. 

 Two of these specimens have the bellies broadly white, as in cicognani. 

 They are also much larger than streatori. Specimens from Sicamous, 

 in the interior of British Columbia, are fairly typical cicognani, having 

 the under parts broadly white; the upper lip, a strip along the inner 

 border of the hind feet, and the toes of both fore and hind feet, white. 

 Specimens from southeastern Alaska (Juneau, Wraugel, and Loring) 

 must also be referred to cicognani, and not streatori. 



Measurements. Unfortunately, no flesh measurements are available 

 from the type locality. Specimens from Trout Lake, near Mount Adams, 

 Washington, are slightly smaller than the Mount Vernon specimens, 

 and measure as follows: Average of two adult males: Total length, 

 270; tail vertebra?, 83; hind foot, 33. An adult female: Total length, 

 210; tail vertebra, 51; hind foot, 24. 



PUTORIUS RIXOSUS Bangs. Bang's Weasel. 

 (PI. II, figs. 7, 7a.) 



1857. Putorius pusillus Baird: Mammals N. Am., pp. 159-161, 1857. (In part: speci- 

 men from Pembina.) 

 1896. Putorius rixosus Bangs: Proc. Biol. Soc. Wash., Vol. X, pp. 21-1'2, Feb., 1896. 



Type locality. Osier, Saskatchewan, Canada. 



Geographic distribution. Boreal America from Hudson Bay to coast 

 of Alaska (St. Michaels); south to northern Minnesota (Pembina) and 

 Montana (Sun Eiver). 



General characters. Smallest weasel known; tail short and without 

 black tip; only American weasel lacking the black tip. 



Color. Summer pelage: Upper parts dark reddish brown; tip of tail 

 not darker ; under parts white. In winter pelage: Pure white all over, 

 including end of tail. 



Cranial characters. Skull (of type specimen, 9 ad., No. 642 Bangs' 

 Coll. 1 ) very much smaller than the smallest female of any other known 



1 1 am indebted to Mr. Bangs for the privilege of exam in ing this specimen. Unfor- 

 tunately, the basioccipital is broken off; hence the basilar length is estimated. 



