64 



ISrOETH AMEEICAN FAUNA. 



[No. 37. 



Condylo-basal length, 101-107.4 (103.6) ; palatal length, 57-62.5 (58.9) ; 

 postpalatal length, 38.3-41.7 (40.1); length of nasals, 41.5-45.3 

 (43.2); zygomatic breadth, 62.8-67.4 (65.8); breadth across mastoids, 

 44.2-48.3 (46.6); least interorbital breadth, 24-25.8 (25.3); breadth 

 of rostrum, 22-24.8 (23.1); maxillary tooth row, 22-23.5 (22.8). 

 Adult female: 1 Condylo-basal length, 101.8-104.6 (103.2); palatal 

 length, 56.5-61.2 (58.9); postpalatal length, 36.4-41.1 (38.8); length 

 of nasals, 41-43.6 (42.3) ; zygomatic breadth, 65.3-66.2 (65.8) ; breadth 

 across mastoids, 45.9-47.3 (46.6) ; least interorbital breadth, 25.4-26.7 

 (26); breadth of rostrum, 23-23.3; maxillary tooth row, 22.7. 



Remarks. — This is the darkest and one of the largest of the races 

 of caligata. It intergrades with caligata in northern British Columbia 

 and southern Yukon, and with okanagana in southern British Colum- 

 bia, but the material at present available is not sufficient to show the 

 exact Hmits of its range. Specimens from the Liard River (Fort 

 Halkett and Fort Liard) are provisionally referred to this race, no 

 skulls from this region being available and the skins being rather 

 indeterminate in characters. Additional material from the northern 

 Rockies may extend the known range of this form farther northward 

 in the interior. 



A series from near Teslin Lake, Yukon, is intermediate between 

 caligata and oxytona; the skulls are smaller than those of typical 

 oxytona, some of them even smaller than those of caligata, but rel- 

 atively narrower. The nasals, though actually longer than in cali- 

 gata, do not extend so far back of the ends of the premaxillae, in this 

 character agreeing with oxytona. 



Specimens examined. — Total number, 63, as follows: 

 Alberta: Smoky River (near Moose Pass), 2. 



British Columbia: Babine (mountains near), 3; Barkerville, 5; Finlay River 

 (mountains near head), 1; Fort Halkett, 1;^ Klappan River (mountains 

 near), 3; Laurier Pass, 1; Level Mountain, 1;^ McConnell Creek (near Sus- 

 tut Mountains), 1; Moose Pass, 2; Moose River (north fork), 2; Sheslay 

 River, 2;^ Stuart Lake, 2; Sustut Mountains, 4; Thudade Lake, 2. 



Mackenzie: Fort Liard, 2. 



Yukon: Teslin Lake (mountains near), 29.^ 



MARMOTA CALIGATA OKANAGANA (King). 

 Okanagan Hoary Marmot. 

 (PL X, fig. 3.) 



Arctomys ohanaganus^ King, Narr. Journ. to Shores of Arctic Ocean, II, 1836, p. 236. 

 Arctomys pruinosus, Audubon and Bachman, Quad. N. Am., Ill, 1854, p. 17, Plate 



cm. (Not of Gmelin.) 

 [Marmota] oJcanagana Howell, Proc. Biol. Soc. Washington, XXVII, 1914, p. 17 



(type locality fixed). 



1 Two specimens from head of Smoky River, Alberta. 



2 Collection Univ. of Michigan. 



3 Collection Amer. Mus. Nat. Hist. 



* Collection Victoria Mem. Mus. ; approaching caligata. 

 6 "Arctomys olcanaganii" on plate. 



