xxiv Birds of Colorado 



Explanations. 



The nomenclature and classification used are almost 

 without exception that of the recently pubhshed third 

 edition of the A.O.U. Checkhst. It was not, therefore, 

 thought necessary to give original references to descrip- 

 tions of species and genera. Measurements are all stated 

 in inches and decimals of an inch. A hst of the local 

 references to Colorado ornithological writings is given 

 with every species, under the author's name and date of 

 his publication. For the complete reference the Biblio- 

 graphy on pages 533 — 51 should be consulted. 



