208 FIELD COLUMBIAN MUSEUM ZOOLOGY, VOL. i. 



legs grayish-white, sometimes tinged with buff. Tail about as 

 long as the head and body, hairy and tufted, bicolor, dark brown 

 above, yellowish-white beneath. Ears large, covered with black 

 hairs. Skull resembles that of S. calif or nicus, but is much 

 smaller, and the frontals at the orbital region are considerably 

 constricted, and the palate is narrower even than in S. boylii. 



The following measurements from several individuals exhibit 

 the diminutive size of this species compared with S. calif or nicus. 

 The dimensions and numbers given are those of the collector 

 taken when the specimens were in the flesh: 



No. Total length. Tail. Hind leg. Ear. 



26 192 mm. 99 24.5 22 



89 208 " 105 26 23.5 



Type 24 193 " ioi 26 23.5 



408 189 " 104 21 22 



88 203 " 102 25 23 



47 195 " 103 26 23.5 



25 IQI " 96 25.5 23.5 



238 193 " 96 26.5 21.5 



32. Peromyscus truei. 



Hesperomys truei. .Schufeldt, Proc. U. S. Nat. Mus., vol. viii, 

 p. 407, pi. xxi, 1885. 



Eighteen specimens from Anderson Ranch, Douglas Co., 

 Nevada. I compared these with specimens of truei in the Na- 

 tional Museum, Washington, and found them to agree iu every 

 particular, both skins and skulls. The type described by Dr. 

 Schufeldt comes from Fort Wingate, New Mexico, and this new 

 locality extends the range of the species a long distance to the 

 north. The examples were all taken in the month of August, 

 and are of a pale yellowish gray color, inclining to buff on the 

 rump and sides in some individuals, the young being a slaty 

 blue. 



33. Peromyscus texanus gambelii. 



Hesperomys gambelii. Baird, U. S. P. R. R. Exp., 1857, 

 vol. vii, p. 464. 



Four hundred and sixteen specimens from following localities : 

 Portola, San Mateo Co., 142; Alum Rock Park, Santa Clara 

 Co., 24; Mt. Hamilton, Santa Clara Co., 7; Snow Mountains, 

 Calusa Co., 30; Pyramid Peak, Eldorado Co., 41; Silver Lake, 

 AmidorCo., 139; Big Trees, Calaveras Co., 14; Hermit Valley, 

 Calaveras Co., 18; Bloods, Calaveras Co., i. 



