1912.] Townsend, Mammals from Lower California. 125 



34. Neotoma albigula seri subsp. now Tiburon Island Wood Rat. 



In color similar to N. albigula, which it resembles more nearly than any other 

 species. Teeth rather small; interorbitals narrow; interparietals small as com- 

 pared with albigula. Named for the Seri Indians inhabiting Tiburon Island. 



Type No. 31940, male. 



Represented by 1 male and 2 females, Tiburon Island, April 12-13. 

 Measurements, average of three specimens: total length, 328; tail, 

 149; hind foot, 34. 



35. Neotoma insularis sp. nov. Angel Island Wood Rat. 



Nearest to N. intermedia gilva and about the same size, but paler, grayer and 

 less yellowish. Skull relatively shorter and broader, with heavier rostrum, heavier 

 dentition and larger auditory bulla?. 



Type No. 21922, female, Angel del la Guardia Island, April 11. 



Measurements of type: total length, 290; tail, 120; hind foot, 35. 



Deer Mice. 



These nocturnal animals, abundant in most parts of North America, are 

 common almost everywhere in Lower California and the outlying islands. 

 The traps set for them at night seldom failed to yield specimens, but we 

 learned little of their habits. They feed largely on seeds and inhabit all 

 sorts of natural crevices under rocks and the roots of trees and bushes. 

 They are extensively preyed upon by owls, snakes, and weasels. 



36. Peromyscus eremicus cedroscensis Allen. Cedros Island Mouse. 

 One male, 3 females, Cedros Island, March 10-12. 



37. Peromyscus maniculatus coolidgi Thomas. Coolidge's Field 



Mouse. 



Female, San Bartolome Bay, March 14. 



38. Peromyscus eremicus polypolius Osgood. Margarita Island 



Mouse. 



Three males, 4 females, Santa Margarita Island, March 19-21. 



39. Peromyscus eremicus eva Thomas. Eva's Mouse. 



Four males, Cape San Lucas, March 24-25; 1 male, San Jose del Cabo, 

 March 26; 1 male, 1 female, Pichilinque Bay, March 28-30; 4 females, 



