EMPIDONAX. 343 



2.55-2.65 (2.60), tail 2.20-2.50 (2.38), other 

 measurements about as in male. Nest deep 

 cup-shaped, bulky, usually built between forks 

 of an upright twig or branch, in bushes, com- 

 posed of plant-down, straws, etc. Eggs 2-4, 

 .71 X -53, similar in color to those* of E. aca- 

 dicus, but averaging paler, both in ground- 

 color and in markings. Sab. Western North 

 America, north to Sitka and Fort Simpson ; 



south, in winter, into Mexico 466. E. pu- 



sillus (Swains.). Little Flycatcher. 

 h 2 . Similar to E. pusillus, but averaging more de- 

 cidedly olivaceous above and more distinctly 

 tinged with yellow beneath, the bill shorter 

 and broader, and tarsus shorter. Male : Wing 

 2.60-3.00 (2.81), tail 2.40-2.60 (2.48), culmen 

 .60-.64 (.62), bill from nostril .32-37 (.34), 

 width at base .29-.30 (.30), tarsus .64-.67 (.66); 

 Female : Wing 2.50-2.65 (2.58), tail 2.25-2.35 

 (2.30). Nest and eggs as in E. pusillus, the 

 latter averaging .73 X -53. Hob. Eastern 

 North America ; soutb, in winter, through 

 Middle America to northern South America. 

 466a. E. pusillus traillii (Auc). 

 Traill's Flycatcher. 

 g 2 . Tail slightly, but decidedly, emarginated; wing av- 

 eraging less than 2.60. (Length 4.90-5.50.) 

 Hardly distinguishable in color from E. pusillus 

 and E. traillii, but wing-bands usually whiter. 

 Male: Wing 2.30-2.60 (2.49), tail 2.10-2.40 

 (2.30), culmen .53-.59 (.56), bill from nostril 

 .27-.31 (.29), width at base .23-.27 (.25), 

 tarsus .59-.68 (.65). Female : Wing 2.20-2.40 

 (2.33), tail 2.10-2.25 (2.18). Nest very com- 

 pactly felted, cup-shaped, composed chiefly of 

 grayish plant-fibres, placed in fork of upright 

 branches of bushes or small trees. Eggs 2-4, 

 .64 X -49, plain buffy white. Sab. Eastern 

 North America, breeding from northern 

 United States northward ; south, in winter, 

 through Middle America, to Panama. 

 467. E. minimus Baird. Least Flycatcher. 

 b 2 . Width of bill at nostrils less than half the exposed culmen. 



c 1 . Outer web of outer tail-feather not abruptly paler than inner web ; 

 culmen .55, or less ; tarsus less than .70. (Length 5.25-5.75.) 



