EMPIDONAX. 343 
measurements about as in male. West deep 
cup-shaped, bulky, usually built between forks 
of an upright twig or branch, in bushes, com- 
posed of plant-down, straws, ete. Eggs 2-4, 
.70 X 53, similar in color to those of £. aca- 
dicus, but averaging paler, both in ground- 
color and in markings. Had. Western North 
America, north to Sitka and Fort Simpson ; 
south, in winter, into Mexico. 
466. E., traillii (Avp.). Traill’s Flycatcher.’ 
WV’. Similar to #. 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). Mest and eggs as in E. pusillus, the 
latter averaging .73 <x 53. Hab. Eastern 
North America; south, in winter, through 
Middle America to northern South America. 
466a. E. traillii alnorum Brewsr. 
Alder Flycatcher.” | 
g. Tail slightly, but decidedly, emarginated; wing av- 
eraging less than 2.60. (Length 4.90-5.50.) 
Hardly distinguishable in color from FE. pusillus 
and #. 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). Mest 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 .50, plain buffy white. Hab. Eastern 
North America, breeding from northern 
United States northward ; south, in winter, 
through Middle America, to Panama. 
467. E. minimus Barrp. Least Flycatcher. 
b%, Width of bill at nostrils less than half the exposed culmen. 
c. 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.) 
1 Cf. Brewster, The Auk, xii. April, 1895, pp. 159-161. 3 Tbid., pp. 161-163. 
