Bibliography 
xxvii 
as to the result of work against these animals in various States, 
statistics, etc. 
Baird, S. F. Exploration and Survey of the Valley of the Great 
Salt Lake, of Utah, including a Reconnaissance of a New Route 
through the Rocky Mountains. By Howard Stansbury, 
Captain Corps of Topographical Engineers, U. S. Army. 
Philadelphia, 1852. Appendix C, Zoology. Mammals by 
Spencer F. Baird. Contains description of Pseudostoma (now 
Cratogeomys) castanops. Type collected by Lieut. Abert, near 
Bent's Fort, Colorado. 
Baird, S. F. Characteristics of Some New Species of North Ameri- 
can Mammals, Collected Chiefly in Connection with the U. S. 
Surveys of a Railroad Route to the Pacific. Proc. Acad. Nat. 
Sci. Phila., vii., pp. 333-336 (1855). Contains descriptions 
of Cynomys gunnisoni from Cochetope Pass, and Perodipus 
montanus from the San Luis Valley in Colorado, these being 
the original descriptions in each case. 
Baird, S. F. Reports of Explorations and Surveys to Ascertain the 
most Practicable and Economical Route from the Mississippi 
River to the Pacific Ocean. Made under the Direction of the 
Secretary of War in 18 53-1 8 5 6, According to the Acts of Con- 
gress of March 3, 1853, May 31, 1854, and August 5, 1854. 
Vol. viii. Washington, 1857. (The Mammals of North Amer- 
ica.) Describes Microtus modestus from Saguache (Cochetope) 
Pass, Colorado. 
Bangs, Outram. Descriptions of Two New Pikas from Western 
North America. Proc. New England Zoological Club, i., pp. 
39-42. 1899. Describes Oc/iotowa 5art:a^^7w from Snowy Range, 
Montgomery, Park County, Colorado. 
Cary, Merritt. Some Unrecorded Colorado Mammals. Proc. 
Biol. Soc. Wash., xx., pp. 23-28. 1907. Records for the 
first time the occurrence in Colorado of a number of species. 
Gary, M. A Colorado Record for C alios pernio philus wortmani, 
with Notes on the Recent Capture of Antrozous pallidus. 
Proc. Biol. Soc. Wash., xx., pp. 85-86. 1907. 
Cooper, C. A. The Big Game of North America. Its Habits, 
Habitat, Haunts, and Characteristics; How, When, and 
Where to Hunt It. Edited by G. O. Shields. 1890. In- 
cludes an article on the Wolverene by C. A. Cooper which 
gives records of the animal in Colorado. 
