AMPHIBIA AND REPTILIA OF COLORADO 47 



Fort Laramie, Wyo., and Laramie, Wyo., have certainly been con- 

 fused in some instances. Nebraska in the early reports may mean any 

 portion of the territory formerly included under that name, thus 

 requiring an extensive knowledge of both western geography and 

 western history to avoid mistakes. Some Fort Bridger, Wyo., records 

 have been inadvertently placed in Utah, and some Fort Garland, Colo., 

 records have been ascribed to New Mexico. We have tried to avoid 

 all records where there is a real doubt as to the locality, or have indi- 

 cated the doubt. In the accompanying bibliography we have included 

 all the publications which have reached our attention directly bearing 

 upon Colorado herpetology, several which are limited to neighboring 

 states, some works of general reference and several on fossil forms. 



In citing the published records we have given the names used by 

 the authors cited, so that the reader may determine for himself 

 whether, in the light of present-day knowledge or future investigation, 

 such references are justifiable. As in all other branches of natural 

 science, nomenclature is rapidly changing. 



Material. — The classification and description of the Colorado 

 species has been based, as far as possible, on specimens actually 

 examined by us. No records have been included in this report which 

 were not based on captured specimens. When specimens were merely 

 seen, although the identification may have been quite correct, we 

 deemed the chance of error great enough to list them only as "reported 

 specimens." The material used by us is for the most part that in the 

 Museum of the University of Colorado. Through the kindness of the 

 officials of the Colorado State Historical and Natural History Museum, 

 the Colorado Museum of Natural History, the Agricultural College, 

 and the Teachers' College Museum, we have been permitted to exam- 

 ine their specimens of Amphibia and Reptilia and include the records 

 in this report. In addition to the various specimens collected in 

 Colorado, we have made free use of the numerous specimens of Colo- 

 rado species, collected in adjoining states, in the University Museum. 



We wish to express our thanks to the following persons in particu- 

 lar, through whose kindness the work has been materially advanced: 

 Professor L. A. Adams, Professor A. E. Beardsley, Professor E. Bethel, 



