338 
(48.) 
NORTH AMERICAN BIRDS. 
g'. Lighter and more olivaceous above, the median lower 
parts more distinctly whitish, or less extensively 
interrupted with olive-grayish on breast; wings 
and tail shorter; length 5.90-6.50, wing 3.00-3.45 
(3.27), tail 2.50-2.90 (2.71), exposed culmen 43- 
52 (.48), width of bill at base .24-.30 (.28), tarsus 
48-53 (51). West a very beautiful saucer-shaped 
structure covered exteriorly with green and gray 
lichens, built usually upon a thick horizontal 
branch. Eggs .72 x 54, pale creamy buff or 
creamy white, spotted, usually in ring round 
larger end, with rich madder-brown and lilac-gray. 
Hab. Kastern North America, north to Canada, 
etc., west to edge of Great Plains; south, in winter, 
to eastern Mexico and Guatemala. 
461. C. virens (Linn.). Wood Pewee. 
g’. Darker and less olivaceous above, the median lower 
parts less distinctly whitish, or more extensively 
interrupted with olive-grayish across breast; wings 
and tail longer; length 6.20-6.75, wing 3.15-3.55, 
(3.34), tail 2.50-2.95 (2.74), exposed culmen 44- 
51 (.48), width of bill at base .27—.32 (.29), tarsus 
A9-56 (.52). Mest composed chiefly of plant- 
fibres (sometimes, though rarely, ornamented with 
lichens), often built in forks of branches. ggs 
.71 < 54, colored like those of C. virens. lab. 
Western North America, east to Great Plains, 
north to British Columbia and interior of British 
America, south, in winter, through Mexico and 
Central America to Costa Rica.. 462. C. richard- 
sonii (Swains.). Western Wood Pewee. 
f?. Lores whitish, in strong contrast with color of forehead 
and ear-coverts; throat pure white; otherwise very 
similar in color to C. virens, but bill much longer, 
broader, and more flattened; lengta (skin) 5.60, wing 
3.20, tail 2.60, exposed culmen .55, width of bill at 
base .35, tarsus .50. Hab. Yucatan. 
C. albicollis Lawrz. ‘White-throated Wood Pewee.! 
é. Second quill not conspicuously (if any) longer than third, and 
fourth not conspicuously longer than fifth; wing not more 
than 3.05 (usually less than 3.00). 
Above dull olive, decidedly darker on top of head, lighter 
on rump; wings and tail dusky, the former varied by 
1 Contopus albicollie Lawn., Ann. Lye, N. Y. Ac. Sci. iii. No. 5, Jan. 5, 1885, 156. 
