2i8 FIELD COLUMBIAN MUSEUM ZOOLOGY, VOL. i. 



Four specimens from the Yellowstone National Park. 

 Rather larger in measurements than the usual run of arcticus 

 with larger ears. 



The four examples measure : 



Total length. Tail. 



165 mm. 65 



165 " 67 



170 " broken. 



160 " 70 



6. Microtus longicaudus. 



Arvicola (mynomes) longicauda. Merr., Am. Nat., vol. xxii, 



P- 934- 



One specimen, Yellowstone National Park, Wyoming. 



FAMILY LEPORID.E. 



7. Lepus campestris. 



Lepus campestris. Bachm., Jour. Acad. Nat. Scien., Phila., 

 vol. vii, 1837, p. 349. 



One specimen from Eagle Creek, Montana. 



8. Lepus bairdii. 



Lepus bairdii. Hayden, Am. Nat., vol. iii, 1869, p. 115. 

 One young specimen from Eagle Creek, Montana. 



9. Lepus baileyi. 



Lepus baileyi. Merr., Proc. Biol. Soc. Wash., vol. xi, 1897, 

 p. 147. 



Two specimens from Billings, Montana. 



FAMILY MUSTELID.E. 



10. Putorius longicaudus. 



Mustela longicauda. Bon., Charlesw. Mag. N. H., vol. ii, 

 1838, p. 38. 

 One specimen from Eagle Creek, Montana. 



