6 CALIFORNIA ACADEMY OF SCIENCES. 



of the Fortieth Parallel. Part 3. Ornithology. Prof. 

 Ridgway made observations at Sacramento from June 

 6th to July 4th, 1867, afterward crossing the Sierra to 

 Truckee Valley, Pyramid Lake, Carson and other local- 

 ities in western Nevada, where the remainder of 1867 

 was spent. Observations were continued in western 

 Nevada until July, 1868. Afterward the route from 

 Austin to Salt Lake was explored. 



Dr. W. J. Hoffman. Annotated List of the Birds of Ne- 

 vada, Author's Edition, Vol. 6, U. S. Geological and 

 Geographical Survey. Dr. Hoffman followed the 115th 

 meridian from near northern Nevada, southward to 

 about 37 latitude, thence westward to Owen's Valley, 

 California, and from this point southeast to Fort Mojave, 

 and thence up the Colorado River beyond Nevada. 



Baird, Brewer and Ridgway, North American Birds. 

 No doubt the most complete work on North American 

 birds ever published in America. It has also a merit 

 that is getting rarer of late, that of giving credit to 

 whom credit is due. 



Bulletin of the Nuttall Club. A quarterly journal of 

 ornithology. The first volume was issued in 1876. It 

 afterward became the Auk. 



The Auk, the organ of the American Ornithologists' 

 Union. 



In addition to the forenamed authorities, a few items 

 have been culled from other publications. The Pro- 

 ceedings of the Phila. Acad., containing Dr. Gambel's 

 papers, and the Proc. Cal. Acad. Sci., containing some 

 of Dr. Cooper's articles, came into my possession too 

 late to benefit much by them. 



There being no correspondents in Nevada, I have 

 drawn freely upon the valuable reports and papers of 

 Messrs. Bendire, Henshaw, Ridgway and Hoffman. 



By Central California I refer to the part of the State 



