Mr. R. Ridgway on the Genus Empidonax. 463 



yellow on belly, the throat biifty whitish, and 

 lower tail-coverts yellowish wliite. Wing 

 2-3o-2-55 (average :^-43j inches, tail 1-90-2-15 

 (2-0o), culmen 0-48-0-50 (0-49), width of 

 bill at base 0-20, tarsus 0-o2-0-58 (0-5G).— 



Hob. Southern Mexico E. fxihifrons ruhicundus. 



(•-. Upper parts dull greyish brown, lower parts pale 

 but!', deepening into oehraceou.-> buff' on breast. 

 Wing 2- 20-2-45 (2-34) inches, tail 1-95-2-14 

 (2-OG), culmen O-50-O-oo (0-52), width of bill at 

 base 0-20- 0-22 (0-21).— ^a6. North-western 

 Mexico and contiguous portions of Arizona 



and New Mexico , E.fulvifrons pygmaus. 



'. Lower parts whitish or yellowish, shaded across 



breast with greyish or olivaceous, 

 c^ Upper parts umber-brown. 



d}. Lower tail-coverts buff; whitish in very much 

 worn specimens only. Above brownish, 

 darker on top of head, the wing-bands vary- 

 ing from dull light brownish buff to tawny ; 

 chin and throat white ; rest of lower parts 

 pale smoky buff, shaded across breast with 

 smoky brown ; under wing-coverts deep buff" 

 or ochreous. Wing 2-35-2-40 (2-37) inches, 

 tail 2-15-2-32 (2-24), culmen O-GO-0-67 (0-64), 

 width of bill at base 0-30, tarsus 0-67-0-68.— 

 Hab. Southern Mexico (Vera Cruz) to Gua- 

 temala E. alhi(jidaris. 



cp. Lower tail-coverts white or veiy pale sulphur- 

 yellow. Upper parts uniform brown, the 

 wing-bands buffy ; lower parts dull whitish, 

 tinged with pale sulphur-yellow, the throat 

 and lower tail-coverts more distinctly 

 whitish ; under wing-coverts and thighs deep 

 dull buff. Wing 2-35-2-50 (2-42)' inches, 

 tail 2-30, culmen 0-59-0-60, width of bill at 

 base 0"25, tarsus 0'55. — Hah. Paraguay and 



South-eastern Brazil E. brunneus. 



&■. Upper parts olive, olive-greenish, or greyish. 

 d"^. Lower parts not distinctly j'ellowish. 



e^. First quill shorter than ninth. Above deep 

 olive, the hind neck more greyish, and top 

 of head dull slaty ; wing-bands very shai^ply 

 detiued, dull white or verj^ pale olive- 

 greyish, in conspicuous contrast with the 



