220 FIELD COLUMBIAN MUSEUM ZOOLOGY, VOL. i. 



8. Peromyscus michiganensis. 



Mus. michiganensis. Aud. & Bach., Jour. Acad. Nat. Scien., 

 Phila., vol. viii, 1842, p. 305. 



Two specimens from Knoxville and 4 from Dickinson, Dakota. 



The Dakota specimens are much redder than those from Iowa, 

 caused by differences in age, the Dakota examples being older. 



FAMILY GEOMYID.E. 



9. Thomomys talpoides. 



Cricetus talpoides. Rich., Zool. Jour., vol. iii, App., 1828, 



P- 518- 



Six examples, Canonball River, Dakota. 



ORDER INSECTIVORA. 



FAMILY SORICID.E. 



10. Blairina brevicauda. 



Sorex brevicauda. S__, _ 

 One specimen, Knoxville. 



FAMILY TALPID.E. 



Blairina brevicauda. 



Sorex brevicauda. Say Long's Exped., vol. i, 1823, p. 164. 

 One snecimen. Knoxville. 



11. Scalops argentatus. 



Scalops argentatus. Aud. & Bach., Jour. Acad. Nat. Scien., 

 Phila., vol. viii, 1842, p. 292. 

 One specimen, Knoxville. 



FAMILY LEPORID.E. 



12. Lepus sylvaticus mearnsii. 



Lepus sylvaticus mearnsii. Allen, Bull. Am. Mus. Nat. Hist., 



1894, v l- Vl > P- I 7 I - 



Seven specimens : 5 Knoxville, Iowa ; 2 Dickinson, Dakota. 



