xxxii The Mammals of Colorado 
North America. Washington, 1909. The only complete work 
on North American rabbits; just published, and very useful. 
Osgood, Wilfred H. North American Fauna, No. 18. Revision 
of the Pocket Mice of the Genus Perognaihus. 1900. Gives 
Colorado records of various species. 
Osgood, W. H. North American Fauna, No. 28. Revision of the 
American Genus Peromyscus. 1909. An excellent piece of 
work, recently published, and containing many Colorado 
references and records. 
Palmer, T. S. The Jack Rabbits of the United States, Biological 
Survey Bulletin No. 8. 1897. Gives descriptions and ranges 
of the different species of Jack Rabbits, mentioning Colorado 
several times, also accounts of Jack Rabbit hunts. 
Pike, Zebulon M. An Account of Expeditions to the Sources of 
the Mississippi and through the Western Parts of Louisiana to 
the Sources of the Arkansaw, Kans, La Platte, and Pierre Jaun 
Rivers. Performed by Order of the Government of the United 
States during the Years 1805, 1806, and 1807, etc., etc., by 
Major Z. M. Pike. Philadelphia, 1810. Cones' edition, 
in 3 volumes, published by Francis P. Harper, New York, 
1895. Pike mentions Buffalo, Deer (O. macrourus); Deer, 
new species (O. hemioniis), Nov. 26, 1806, Cheyenne Mountain ; 
Hare ; and Bighorn ; all within the limits of what is now Colorado. 
Preble, Edward A. North American Fauna, No. 15. Revision 
of the Jumping Mice of the Genus Zapus. 1899. Gives 
Colorado records of various species. 
Preble, E. A. North American Fauna, No. 27. A Biological 
Investigation of the Athabasca-Mackenzie Region. Washing- 
ton, 1908. Has many interesting accounts of the habits of 
species found in Colorado, and of species allied to ours. 
Rhoads, Samuel N. Synopsis of the American Martens. Proc. 
Acad. Nat. Sci. Phila., May, 1902. Describes Mustela 
caiirina origenes from type collected at Marvine Mountain, 
Rio Blanco County, by Ernest Thompson Seton. 
Rhoads, S. N. Contributions to a Revision of the North American 
Beavers, Otters, and Fishers. Trans. Amer. Philos. Soc, 
xix., pp. 419-439. 1898. Gives ranges of two forms in such 
a way as to include Colorado. 
Roosevelt, Theodore. With the Cougar Hounds. Scribner's 
Magazine, October and November, 1 90 1 . Account of his hunt in 
