Mr. R. Ridgway on the Germs Empidonax. 465 



g-. Tail slightly but decidedly emarginate ; 

 ■wing averaging less than 2"60. 

 Hardlydistinguishable in colour from E. 

 pusillus and E. traillii, but wing- 

 bands usually whiter. Male : Wing 

 2-.'30-2-60 (2-49) inches, tail 2-10- 

 2-40 (2-30), culmen 0-o3-0-59 (0-5G), 

 width of biU at base 0-23-0-27 C0-2o), 

 tarsus 3-59-0-68 (0-65). Female : 

 Wing 2-20-2-40 (2-33), taU 2-10- 

 2-25 {2-18).— Sab. Eastern North 

 America, west to Rocky Mountains, 

 breeding from northern United 

 States northward, south, in winter, 

 through Middle America to Panama U. minhnus. 

 f'^. First quiU usually equal to, or longer than, 

 fifth ; colour above uniform ohve-gi-een 

 or greenish grey. 

 Wing-bands (all stages) buif or buffy 

 whitish ; lower parts white, more or 

 less tinged with sulphm'-yellow pos- 

 teriorly, and (usually very faintly) 

 shaded across breast with olive or 

 greyish. Nestling with feathers of 

 upper parts narrowly ti])ped with 

 paler, producing a slightly mottled 

 appearance. 3Iale : Wing 2-75- 3-10 

 (2-83) inches, tail 2-30-2-70 (2-49), 

 culmen 0-62-0-69 (O-CG), width of bill 

 at base 0-28-0-30 (0-30), tarsus 0-59- 

 0-67 (0-62). Female : Wing 2-55-2-70 

 (2-65), tail 2-25-2-35 (2-32).— Hab. 

 Eastern U.S., south, in winter, through 

 Western Cuba, Eastern Mexico, and 



Central America to Ecuador F. acadicus. 



d*. Lower parts distinctly yellowish. 

 f^. Under wing-coverts pale buff, deepening 

 into dull ochraceous on edge of wing. 

 Above dull greyish olive (more brownish 

 in winter), the wing-bands dull hght 

 buffy greyish (more bufFy in winter) ; 

 lower parts dull pale yellowish, in- 

 clining to pale sulphur- yellow on belly 

 and lower tail-coverts, and shaded 

 with dull greyish brown across breast. 



