BIRDS OF COLORADO. 21 



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

 Gray-headed Snowbird. Am. Sportsman., V. 1875, /!>. j/o. 

 Contains the first published description of the nest and eggs of the Blue 



Crow ( Cyanocephalus cyanocephalus ) also the first description of the nest and 



•eggs of the Gray-headed Snowbird [Junco caniceps). 



AiKEN, C. E. Notes on the Ornithology [of Colorado] observed 



by Mr. C. E. Aiken, Assistant. Ann. RepH Chief of 



Engineers, 1875, part II. Appendix LL, p. 1070. 



A short sketch of the birds observed by him in a trip from Pueblo to 



Pagosa Springs and return by way of the San luis Valley. These notes, in a 



much fuller form, are included in H. W. Henshaw's report on the Birds of the 



Geographical Explorations and Surveys west of the one hundredth meridian. 



Allen, J. A. Notes of an Ornithological Reconnoissance of 

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

 Mus. Comp. Zool. III. 1872, pp. irj-i8j. 



A notable paper for the student of the historical side of Colorado Ornith- 

 ology, as it contains the first real ' ' local list " ever published of Colorado birds. 

 All tiat had been written previous to this time on the birds of Colorado treats 

 of less than twenty-five species, while this paper mentions more than three times 

 -that number. It is not meant that no ornithologists previous to this time had 

 visited Colorado, but that their observations had not at this time been published. 

 Mr. Allen's paper contains in addition to notes on birds from other states, a list 

 ■of birds observed in Colorado, July-August, 1871 (81 species); in South Park, 

 Colorado, July, 1871 (54 species); on Mount Lincoln, Colorado, July, 1871 (36 

 species). Of these 84 species are for the first time accredited to Colorado. 



Allen, J. A. and Brewster, Wm. List of Birds Observed in 

 the Vicinity of Colorado Springs, Colorado, during March, 

 April and May, 1882. B. N. O. C. VIII. 1883, pp. 151 

 and i8p. 



Notes on the arrival, abundance and breeding of 134 species. Also tech- 

 nical notes by Mr. Brewster on the specific characters of 14 species. The first 

 and only records for Colorado of Bendire's Thrasher and the Florida Gallinule 

 are given here. Mr. Brewster here gives the original description oi Helmintho- 

 phila celata lutescens, but without including Colorado in its geographical range, 

 where however it has been taken by subsequent observers. 



Allen, J. A. On the Avi-Fauna of Pinal County, with Re- 

 marks on some Birds of Pima and Gila Counties, Arizona. 

 By W. E. D. Scott, with annotations by J. A. Allen. Auk., 



V. 1888, p. 160. 



States that Troglodytes aedon aztecus is the form found in Colorado. 



Allen, J. A. The North American Species of the Genus 

 Colaptes considered with Special Reference to the Re- 

 lationships of C. auratus and C. cafer. Bull. Am. Mus. 

 Nat. Hist. IV. No. /, 1892, article II. A 2T. 



Considers that true auratus, true cafer and also the mixed forms are found 

 in Colorado. 



American Ornithologists' Union. The Code of Nomen- 

 clature and Check List of North American Birds, adopted 

 by the American Ornithologists' Union, being the Report 



