April 1904] BIRDS OF THE HUACHUCA MOUNTAINS, ARIZONA. 3 



divide it was nearly eig-ht feet deep; while on the first of May there were 

 sheltered spots near the summit of the ran^-e where the snow was still 

 lying. Many times in February and March the thermometer fell as low 

 as 20 degrees Fahr. in the night, occasionally as low as 15 degrees. I 

 did not find the summers unpleasantly hot in the mountains, but on the 

 plains below it became far too warm for comfort. 



I would like here to express my gratitude, first to Mr. G. Frean 

 Morcom. in whose interests these trips were made, and who has assisted 

 me in many ways in compiling and publishing this list; to Mr. Joseph 

 Grinnell, whose opinions T have consulted, and of whose advice I have 

 frequently availed myself; and also to Mr. Ridgway who has kindly 

 indentified for me many of the more obscure and puzzling species. 



HARRY S. SWARTH. 



Los Angeles, California, December i, 1903. 



