BIBLIOGRAPHY. 



This is a list of all the Titles up to December, 1910, containing 

 anything of importance for the study of Colorado Ornithology. They 

 are referred to throughout the text tinder the name of the author, with 

 the abbreviated date only. 



72 Atken, C. E., and Holden, C. H., Jr. Notes on the Birds of 



Wyoming and Colorado Territories. Proc. Boston Soc. Nat. 

 Hist., XV., 1872, pp. 193-210. This paper is edited by Brewer, 

 and only the notes signed " C. E. A.," contributed by Aiken, 

 refer to Colorado. Mr Aiken spent the winter 1871-72 at 

 Fountain, near Colorado Springs, and these observations were 

 made at that time ; some fifty-nine new birds are accredited 

 to the State. 



73 AxKEN, C. E. A glimpse at Colorado and its Birds. Amer. Nat., 



VII., 1873, p. 13. 



73 Aiken, C. E. A New Species of Sparrow. Amer. Nat., vii., 

 1873, pp. 236-7. Centronyx ochrocephalus (= C. bairdi) described. 



75 Aiken, C. E. The Nidification of the Blue Crow and the Grey- 

 headed Snowbird. Amer. Sports., v., 1875, p. 370. 



00 AxKEN, C. E. Seven New Birds for Colorado. Auk, xvii., 1900, 

 p. 298. i.e., Gavia arctica, Ardea egretta, Syrnium nebidosum,, 

 Astragalinus tristis pallidus, Geothlypis agilis, Geothlypis trichas 

 and Wilsonia canadensis. 



81 Allen, C. N. Songs of the Western Meadow-Lark. Bull. Nutt. 

 Om. Club., VI., 1881, p. 145-150. 



72 Allen, J. A. Notes of an Ornithological Reconnaissance of 

 portions of Kansas, Colorado, Wyoming and Utah. Bull. Mus. 

 Comp. Zool., III., 1872, pp. 113-183. This is an important 

 paper for the history of Colorado ornithology. Mr. Allen was 

 the first trained ornithologist to visit the State. He was in 

 Colorado in July and August, 1871, chiefly near Colorado Springs, 

 in South Park and on Mount Lincoln. Some eighty-four species 

 were observed by him for the first time in the State. 



