Appendix, 



ARTIFICIAL KEY TO MALE HUMMING- 

 BIRDS. 



j4. Crown with special ornament in contrast to 

 back. 



I. Crown and throat patch bluish or purplish 

 lilac. 



Costa's Hummingbird . . 65 



n. Crown and throat patch Hlac crimson; size 

 larger than the preceding. 



Anna's Hummingbird . . 66 



B, Crown without special ornaments in either 



sex. 



I. Sides white or green. 



1. Throat velvety black, bordered with 

 violet. 



Black-chinned Hummingbird . 64 



2. Throat violet, iridescent feathers springing 

 from a white ground. 



Calliope Hummingbird . . 69 



II. Sides rufous or cinnamon. 



1. Back chiefly rufous. 



Rufous Hummingbird . . 67 



2. Back chiefly golden green. 



Allen's Hummingbird . . 68 



THE HUMMINGBIRD FAMILY. 



The smallest of birds, with long slender bills, very 

 weak feet, and buzzing wings, giving the bird 

 much the appearance of an insect. Ornamented 



296 



