464i Mr. R. Ridgway on the Genus Empidonax, 



blackish general colour of the wings ; lower 

 parts greyish white, shaded with dull 

 greyish across breast, and tinged with pale 

 sulphui-.yellow. Wing 2-30-2-40 (2-37) 

 inches, tail 2-30-2-40 (2-33), culmen 0'55- 

 0-GO (0-58), width of bill at base 0-25-0-27 

 (0-26), tarsus 0-58-0'59.— 7/«5. Western 



Ecuador jE. griscipecttis. 



e^. First quill longer than seventh. 

 y. First quill usually shorter than fifth ; 

 coloui- above olive or greyish brown, 

 never distinctly greenish. 

 g^. Tail even, or very shghtly rounded ; 

 wing averaging more than 2'60. 

 A\ Above olive, usually decidedly greyer 

 on head ; wing-bands in adult vary- 

 ing from dull brownish grey or 

 greyish brown to nearly white; in 

 young deep buff or ochraceous : lower 

 parts white, tinged posteriorly with 

 sidphur-yellow, and shaded on sides 

 of breast with olive-greyish. Male : 

 Wiug 2-70-2-85 (2-75) inches, tail 

 2-35-2-60 (2-51), culmen 0-64-0-73 

 (0'69), width of bill at base 0-27- 

 0-31 (0-29), tarsus 0-65-0-72 (0-68). 

 Female : Wing 2-55-2-65 (2-60), tail 

 2-20-2-50 (2-38).— ^a6. Western 

 North America, north to Sitka and 

 Fort Simpson, south (in winter) to 



Mexico E. piisilhis. 



Jr. Similar to E. ptisillus, but averaging 

 more decidedly olivaceous above 

 and more distinctly tinged with yel- 

 low beneath ; the bill shorter and 

 broader, and the tarsus shorter. 3fale : 

 Wing 2-G0-3-00 (2-81), inches, tail 

 2-40-2-GO (2-48), culmen 0-60-0-G4 

 (0-62), width of bill at base 0-29- 

 0-30 (0-30), tarsus 0-G4-0-67 (0-66). 

 Female : Wiug 2-o0-2-6o (2-58), tail 

 2-25-2-30 (2-30).— JIab. Eastern 

 North America, south, in winter, 

 through Middle America to northern 

 South America , . E. piiailli/s iraUlii 



