74 EVOTOMYS. 



Color. Top of head and dorsal region to base of tail golden-brown 

 lined with black; sides of head and body golden-brown; no black lines; 

 throat, underparts and inner side of limbs white; outer side of limbs 

 golden-brown, passing into dusky toward wrists and ankles; hands 

 white, feet mixed white and dusky; tail hairy, black above grayish 

 beneath; ears dark brown, mostly naked. Ex type in American 

 Museum of Natural History. 



Measurements. Total length, 380; tail, 170; hind foot, 36. 

 Skull: Total length, 47; Hensel, 38.5; zygomatic width, 25; inter- 

 temporal width, 6.6; length of nasals, 19; length of upper molar series, 

 8.7; length of mandible, 24.1; length of lower molar series, 9.1. Ex 

 type in American Museum of Natural History. 



Subfamily Microtinae. 

 Genus Evotomys (80). 



Evotomys phaeus Swarth. 



Evotomys phaus Swarth, Univ. Calif. Publ. Zool., VII, 1911, p. 127. 

 Type locality. Marten Arm, Boca de Quadra, Alaska. 



Evotomys dawsoni insularis Heller. 



Evotomys dawsoni insularis Heller, Univ. Calif. Publ. Zool., V, 



iQio, P- 339- 



Type locality. Canoe Passage, Hawkins Island, Prince William 

 Sound, Alaska. 



Evotomys gapperi athabascae Preble. 



Evotomys gapperi athabasca Preble, N. Am. Fauna, 1908, No. 27, 

 p. 178. 



Type locality. Fort Smith, Slave River, near Alberta- Mackenzie 

 Line, Canada. 



Genl. Char. Equal in size to E. gapperi; face grayer, flanks and 

 lower parts lighter. Skull larger; braincase less round. 



Color. Red Phase. Nose and sides of face gray; underparts white ; 

 hands white; feet pale brown; tail above brown, white beneath. Ex 

 type in United States National Museum. 



Measurements. Total length, 148; tail, 38; hind foot, 1 8. Skull: 

 Occipi to-nasal length, 25.3; Hensel, 21.5; zygomatic width, 13.1; 

 intertemporal width, 3.9; length of nasals, 7.8; length of upper molar 

 series, 5.2; length of mandible, 13; length of lower molar series, 5.4. 

 Ex type in United States National Museum. 



