174 KANSAS ACADEMY OP SCIENCE. 



Family Murid.e. Rats, Mice, Voles. 



18. Mus norvegicus Erxleben. Brown Rat. 



Common everywhere in the state, and a great pest. 



19. Mus musculus Linn. House Mouse. 



Common throughout the state. 



20. Onychomys leucogaster Weid. Missouri Grasshopper Mouse. 



Found in many parts of the state, but not common. I captured a specimen 

 at Kinsley in November, 1904. 



21. Onychomys torridus Coues. Arizona Scorpion Mouse. 



Probably rare in the state. It is included here on the authority of Doctor 

 Coues, in "Rodentia of North America." 



22. Peromyscus taxanus Woodh. Texas White-footed Mouse. 



Included on the authority of specimens taken at Pendennis and Lang 

 Island by Mr. Granger. They may be the same as the next — the 

 Fulvous White-footed Mouse. 



23. Peromyscus texanus nebrascensis Mearns. Fulvous White-footed Mouse. 



Rather common in western Kansas. 



21. Peromyscus michiganensis Aud. and Bach. Michigan White-footed Mouse. 



Abundant in eastern Kansas. The genus Peromyscus is in great confu- 



fusion. While it is probable that a revision of it will greatly reduce 



the number of forms now recognized, it is probable that explorations 



in Kansas will add from one to five varieties to our present known list. 



25. Sigmodon hispidus texianus Aud. and Bach. Cotton Rat. 



Taken at Cairo, Kan., by the United States Biological Survey. 



26. Oryzomys palustris Harlan. Rice-field Mouse. 



Taken at Neosho Falls by Captain Goss. 



27. Reithrodontomys dychei Allen. Dyche Harvest Mouse. 



Type from Lawrence, Kan. Rather common in the eastern half of the 

 state and probably farther west. 



28. Reithrodontomys dychei nebrascensis Allen. Nebraska Harvest Mouse. 



Reported from Pendennis, Lane county. Taken by Mr. Granger. Re- 

 garding the Lane county specimens, I may say that good authorities 

 insist that they are identical with R. dychei. However, specimens 

 from Onaga in the collections of the Biological Survey, prove to be 

 specifically distinct from R. dychei. Whether they will be described 

 as a new species or referred to any other form now recognized I am 

 not now able to say. It is very desirable that series of specimens of 

 this genufe from many parts of Kansas shall be collected. 



29. Neotoma campestris Allen. Prairie Wood Rat. 



Type from Pendennis, Kan. 



30. Neotoma baileyi Merr. Bailey's Wood Rat. 



Common in eastern Kansas. It is now supposed that the above two 

 forms are identical. Should this prove correct the latter would have 

 priority. It is probable that Neotoma micropus surberi Elliot may 

 occur in southwestern Kansas. 



31. Microtus pennsylvanicus Ord. Meadow Vole. 



Found in marshy lands in eastern Kansas. 



