BIRDS OF COLORADO. 41 



1820. Maj. Long. Up the South Platte to Denver ; across the " Divide " 

 to Colorado Springs and south into Nev7 Mexico. 



1844 and 1845. Capt. Fremont. Across the State via Grand River, 

 Pueblo, Denver and Fort Morgan. 



185 1. Capt. Pope. Came from New Mexico north and east to La Junta 

 and east to ICansas. 



1853. Capt. Gunnison. Crossed the plains to the Arkansas River, up 

 that stream and its branches to Trinidad, Colorado, across southern Colorado to 

 Fort Massachusetts, over the Continental divide to the Gunnison River, down 

 this stream and the Grand River to Utah. 



1855. Lieut. Warren. Just touched Colorado at Julesburg. 



1856. Lieut. Bryan. Up the South Platte to Fort Morgan and north into 

 Wyoming. 



1859. Col. Loring and Capt. Macomb. Across the southwest corner of 

 ■Colorado in passing from Utah to New Mexico. 



The Specimens collected by these various expeditions, to- 

 gether with the field notes of the naturalists were worked up by- 

 Prof. Baird and his assistants, and incorporated in the ninth 

 volume of the Pacific Railroad Reports. There occur here the 

 first specific Colorado references to anas discors, aythya ameri- 

 ■cana, grus mexicana, lagopus leucurus^ centrocercus urophasia- 

 nus, senaidura macroura, cirais kudsonms, buteo swainsoni^ 

 falco sparverius, asio wilsonianus^ speotyto cunicularia kypogtza, 

 dryobates villosus hyloscopus, colaptes auratus^ otocoris alpestris 

 arenicola, xanthocephalus xanthocepkalus, oroscoptes mojitanus, 

 .troglodytes dedon aztecus^ parus atricapillus septentrionalis and 

 sialia arctica. 



"Note. It may seem an anchronism to say that Baird 

 added d. v. hyloscopus to the Colorado list, since it was not sepa- 

 rated as a variety until many years later. What is meant, of 

 course, is that Baird added the bird which is now called d. v. 

 hyloscopus, though he himself used a difierent name for it. J 



1859. Baird. In volume ten of the Pacific Railroad 

 Reports, in giving the list of the birds taken by Capt. Gunni- 

 son's party, Baird notes specifically as from Colorado, several 

 species that were on hand when volume nine was written, but 

 which are not specially mentioned there as having been taken 

 in Colorado. They are buteo borealis calurus, chordeiles virgin- 

 ianus henryi, perisoreus canadensis capitalist and corvus corax 

 sinuatus. 



1870. Baird. Cooper's Birds of California, I. x^-jo, p. 163. 

 Leucosticte tephrocotis taken by Wernigk at Denver. 



1872. Allen. Bui. Mus. Comp. Zool III. 1872, pp. 113- 

 183. The visit of J. A. Allen to Colorado laid the foundation 

 of our knowledge of the birds of the State. Passing across 

 the plains, collecting along the base of the foothills and ascend- 

 ing above timber-line on one of the highest mountains, he pre- 

 sented the first "local list" from Colorado and the first state- 

 ment of the vertical range of the diflFerent species. Mr. Allen's 

 opportunities for observation were neither so good nor so exten- 



