118 Proceedings of the Biological Society of Washington. 
S'. No. fgifi, U. Nat. ^lus., Biological Survey Collection. Collected 
June 20, 1891, by Clark P. Streator; original number, 970. 
Characters. — Considerably larger tban fuscus ; skull long and bigb with 
narrow braincase and wide nasals. Color darker and richer tban in 
fascns; iijiperparts dark liazel, becoming more yellowisb on sides, and 
this shading into bulfy wash on lowerparts; ear patches l)lack ; nose 
plumbeous; I'eet and tail butTy gray. There is rarely a trace of white on 
chin or throat. 
Measurements of type. — Total length, 22o; tail vertebrae, 77; bind foot, 
no. 
Thomomys fuscus loringi subsp. nov. 
ALBERTA GOPHER. 
Type from South Edmonton, .Ul)erta. Adult cJ*, No. 08,74(1, U. S. Nat. 
iMus., Biological Survey Collection. Collected Septeml)er 23, 1894, by 
J. A. Boring; original number, 2437. 
Characters. —Similar to fuscus but sliglitly larger and duller colored, 
Avitb relatively heavier dentition, and small, circular interparietal; ears 
small and pointed as in the /rschs group. Color in winter pelage (Sep¬ 
tember 2))): Upperparts dull russet brown, becoming rich bufJ on sides; 
nose slaty gray; small ear patch black; lowerparts rich buft'y over plum¬ 
beous; chin and small spot on breast white; feet soiled whitish; tail jrale 
huffy. Cither pelages not known. 
Measurements of ty])C. —Total length, 199; tail vertel)rm, 47; bind foot, 
25. 
Thomomys nevadensis atrogriseus subsp. nov. 
SNAKE RIVER GOPHER. 
Type from Nampa, Idaho. Adult c?, No. 181,198, tl. S. Nat. JIus., 
Biological Survey Collection. Collected IMarcli 15, 1913, by L. E. 'Wyman; 
original number, 35. 
Characters. —Xhowi the size of nevadensis and also dichromatic, but 
darker colored in gray phase and blacker in melanistic phase. Skull 
relatively wider at base and with shorter, thicker pterygoids. Color in 
gray phase: Upperparts dark huffy gray or sooty buff’; nose and face 
blackish; ear patch black; feet and tail dirty gray; lowerparts washed 
with rich buff'; cheek pouches lined with black and white; chin white. 
Color in black phase: Dull slaty black all over except white patch on 
chin and white toes, and usually lower part of feet. 
Measurements of type. —Total length, 315; tail vertebra?, 100; hind foot, 
38. 
