34 MA KM OTA. 



Marmota oxytona Hollister. 



Marmota sibila Hollist., Smith. Misc. Coll., LVI, 1912, p. i. 



M armota oxytona Hollist., Science, XXXIX, 1914, p. 251. 



Tyfx locality. Head of Moose Pass, Branch of the Smoky River, 

 Alberta, Canada. Altitude, 7,200 feet. 



(.ifiil . Char. Larger than M. caligata; colors dark; cheeks ochra- 

 <us. Skull large; teeth a little smaller than those of species com- 

 pared. 



Color. Top of head and nape grizzled brown and black, top of 

 nose and stripe on cheek black; forehead in center white; sides of 

 neck ochraceous; shoulders and upper back the hairs are black at 

 base then white and tipped with brownish- black, giving a grizzled, 

 light appearance to this part; lower back a grizzled brown, black and 

 buff; throat ochraceous; rest of underparts brownish gray, becoming 

 hazel at base of tail; tail above black bordered and tipped with 

 mummy-brown; beneath all mummy-brown; hands and feet black, 

 the hands with a few white hairs. Ex type in United States National 

 Museum. 



Measurements. Total length, 720; tail, 210; hind foot, 95. 

 Skull: Occipito-nasal length, 103.8; Hensel/88.2; zygomatic width, 

 07; intertemporal width, 15; palatal length, 50.5; length of nasals, 

 44 ; length of upper molar series, 22.8; length of mandible, 72.9; length 

 of lower molar series, 20. Ex type in United States National Museum. 



Marmota monax rufescens Howcll. 



M armota monax rufescens Howell, Proc. Biol. Soc. Wash., XXVII, 



i9!4> P- 13- 

 Type locality. Elk River, Minnesota. 



Genl. Char. Similar to M. monax but redder. 



Geogr. Distr. Southern part of Minnesota, Wisconsin, Michigan, 

 Ontario and the greater part of the State of New York. 



Color. Upper parts from nape to lower back ochraceous-buff , and 

 from middle of back to tail darker buff, all the hairs tipped with white; 

 flanks like lower back; top of head blackish; cheeks and upper lip 

 cream white, base of hairs black; outer side of limbs bright chestnut, 

 slightly darker than limbs; tail blackish, hairs at base white-tipped, 

 Kcucath black, tinged with chestnut; hands and feet black. Ex type 

 in United States National Museum. 



Measurements. Total length, average of five, 548; tail, 143; 

 hind foot, 83. Skull: Occipito-nasal length, 85; llensel, 77.3; /yg<>- 

 matic width, 64.7; intertemporal width, 17.7; length of nasals, }=;; 

 length of upper molar --0.7; length of mandible, 57.6; length of 



low IT ni-ilar scries, 20. Ex type in United States National Museum. 



