114 Miller Notes on Thomomys bulbivorus. 



Thomomys &w$Mt?omsof Baird and subsequent authors was referred 

 to the Oryctomys [Saccophorus) bottse of Eydoux and Gervais. 



Although the rediscovery of this fine gopher has thus "been 

 made known, it still remains to redescribe the animal, which I 

 propose to do as follows : 



Thomomys bulbivorus (Richardson). 

 Diplostoma (?} bulbivorum Kichardson. Fauna Bor.-Ain., i, 1829, 206, 



pi. xviiiB (lettered "douglasii" by mistake). 

 Thomomys bulbivorus Allen. Bull. Am. Mus. Nat, Hist., v, April 28, 1893, 



56, pi. i, fig. 14 (skull). 



Specific Characters. Largest known species of Thomomys; 

 colors very dark ; white markings about mouth extensive and 

 in striking contrast ; tail almost naked ; skull exceedingly large 

 and heavy. 



Adult ( ?' No. HI, collection of Gerrit S. Miller, Jr., Beaverton, 

 Washington county, Oregon, May 5, 1890; A.W. Anthony, collec- 

 tor) ; dorsal surface mixed clove-brown and yellowish chestnut, 

 the hairs everywhere slaty plumbeous at base, the three colors 

 indescribably blended, but the clove-brown predominating on 

 the head and mid-dorsal region though without forming a distinct 

 dorsal stripe, this giving way on the sides to the chestnut, which 

 in turn is replaced on the belly by slaty plumbeous ; narrow 

 ring around ear, muzzle, lips, outer edge of cheek-pouches, and 

 ill-defined area extending thence to front legs very dark brown, 

 almost black ; linings of cheek-pouches and broad space between 

 white, in striking contrast with surrounding color ; a small white 

 anal spot; dorsum of manus brownish, of pes white; a white 

 tuft at proximal base of large tubercle on palm ; tail very 

 sparsely clothed on basal third with brownish hairs, which are 

 not sufficiently numerous to conceal the skin ; this in the dried 

 specimen yellowish white, dark brown for 10 mm. at tip. 



The three specimens differ but little among themselves in 

 color, the variation, such as it is, being due to the varying 

 amount of clove-brown in the fur of the back. This is a trifle 

 less in the two males than in the female. In one of the males 

 (No. f|f) there is an indistinct wash of mars-brown on the belly. 

 The dorsum of. the right hind foot of No. ||| is covered with 

 brown hairs. This, however, must be purely accidental. 



Unfortunately the specimens were not measured in the flesh, 

 but as they have been prepared with much care the following 

 measurements taken from the dry skins are not without value : 



