1915.] 



MARMOTA CALIGATA GROUP. 



61 



Mackenzie is provisionally referred to this race, no skulls from this 

 entire region being available. 



Specimens examined. — Total number, 102, as follows: 



Alaska: Aleknagik Lake, 2; Becharof Lake, 12; Cape Elizabeth, 8; Charlie 

 River (near head), 1; Chickamin River (Behm Canal), 2;^ Cordova Bay, 3;^ 

 Disenchantment Bay, 1;^ Fort Yukon, 1;^ Hinchinbrook Island, 4; Juneau, 

 4; Kanatak, Portage Bay, 1; Kenai Mountains, 10;^ Kenai Peninsula, 4; 

 Mount McKinley, 1; Portage Bay, 5; Port Snettisham, 2;^ Seldovia, 7f 

 Toklat River (near head), 1; Valdez Narrows, 1;^ White Pass, 4; Yakutat 

 Bay, 2; no specific locality, 2. 



British. Columbia: Bennett, 2; Cheonee Mountains, 15.^ 



Mackenzie: Fort Good Hope (mountains west of), 1. 



Yukon: Coal Creek (head) 4; Kalzas Creek, Pelly River, 2. 



MARMOTA CALIGATA VIGILIS Heller. 

 Glacier Marmot. 

 Marmota vigilis Heller, Univ. of California Pub. ZooL, V, 1909, p. 248. 



Type locality. — West shore of Glacier Bay, Alaska. 



Distribution. — Known only from type locality. 



Characters. — Similar in size and skull characters to caligata; 

 variable in color, but constantly darker than caligata, with a strong 

 tendency to run to blacks and browns ; top of head and hind feet always 

 brown (except in purely melanistic individuals) ; underparts darker. 



Color. — Normal fresh pelage (June 12): Upperparts soiled whitish 

 with a huffy tinge; underfur clove brown at roots, sparingly mixed 

 with dull brown or black; hinder back shading to cinnamon-buff, 

 darkest on rump and hind legs, extensively tipped with blackish 

 brown; underparts dull clay color mixed with grayish white; nose, 

 top of head, and feet blackish brown; sides of face mixed cinnamon- 

 buff and blackish brown; tail above, mixed clay color and chestnut- 

 brown; beneath, blackish chestnut-brown shading to hessian brown 

 in anal region. Variation: The above description is based on the 

 hghtest and apparently most normally colored individual in the 

 series of topotypes. Between this phase and the pure black phase 

 are found numerous intermediate specimens, some as white beneath 

 as caligata and as dark above as oxytona, while others are soHd black- 

 ish brown very similar to M. vancouverensis , but slightly blacker; the 

 hind feet and usually the tail are blackish brown; fore feet black or 

 very dark brown. 



STcull. — Not appreciably different from that of caligata. 



Measurements — Adult male:^ Total length, 630-745 (average, 676); 

 tail vertebrae, 197-210 (205) ; hind foot, 92-102 (97). Adult female : ^ 

 620-680 (652); 170-212 (191); 90-95 (92). Skull: Adult male:^ Con- 

 dylo-basal length, 97.2-98.4 (97.6); palatal length, 54.7-55.8 (55.3); 



1 Collection Mus. Vert. ZooL, Univ. of California. 



2 Collection Mus. Comp, Zool. 



3 Collection Amer. Mus. Nat. Hist. 



* Five specimens from type locality. 



* Three specimens from type locality. 



