A List of the Species Herein Treated xvii 



MOUSE FAMILY or MundcB— 



XVII. Common House-mouse, Mus musculus Linn. 



p. 480 

 XVIII. Grasshopper-mouse, Onychomys leucogaster 

 (Wied). p. ^83 



XIX. Arctic Deermouse, Peromyscus maniculatus arc- 

 ticus (Mearns). p. j.00 



XlXa. Prairie Deermouse, Peromyscus maniculatus 

 bairdi (Hoy and Kennicott). p. 499 



XIX^. Nebraska Deermouse, Peromyscus maniculatus 

 nehrascensis (IMearns). p. 505 



XX. Canadian Red-backed Vole, Evotomys gap- 

 pert (Vigors). p. 506 

 XXa. Prairie Red-backed Vole, Evotomys gapperi 

 loringi Bailey. p. 513 

 XXI. Drummond Vole, Microtus pennsylvanicus drum- 

 mondi (Audubon and Bachman). p. 515 

 XXII. Little Vole, Microtus minor (Merriam). p. 533 



XXIII. Muskrat, Fiber zibethicus (Linnaeus). p. 538 



XXIV. Bog-lemming, Synaptomys borealis (Richardson). 



P-558 



GOPHER FAMILY or Geomyidce— 



XXV. Gray-gopher, Thomomys talpoides (Richardson). 



p. 561 



JERBOA FAMILY or Dtpodidce— 



XXVI. Jumping-mouse, Zapus hudsonius (Zimmer- 



mann). p- 587 



XXVIa. Prairie Jumping-mouse, Zapus hudsonius cam- 



pestris Preble. p. 604 



PORCUPINE FAMILY or Erethizontidce— 



XXVII. Canada Porcupine, Erethizon dorsatum 

 (Linnaeus). p- 605 



