338 NORTH AMERICAN BIRDS. 



g'. Lighter and more olivaceous above, the median lower 

 parts more distinctlj' whitisb, or less extensively 

 interrupted with olive-grayish on breast; wings 

 and tail shorter; length 5.90-G.50, wing 3.00-3.45 

 (3.27), tail 2.50-2.90^2.71), exposed eulmen .43- 

 .52 (.48), width of bill at base .24-.30 (.28), tar.sus 

 .48-.53 (.51). Nest a very beautiful saucer-shaped 

 structure covered exteriorly with green and gray 

 lichens, built usuallj' upon a thick horizontal 

 branch. Kjgs .72 X 54, pale ci'camy buff or 

 creamy white, spotrted, usually in ring round 

 larger end, with rich madder-brown and lilac-gray. 

 Sab. Eastern 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 C. 20-6.75, wing 3.15-3.55, 

 (3.34), tail 2.50-2.95 (2.74), exposed cuhnen .44- 

 .51 (.48), width of bill at base .27-.32 (.29), tarsus 

 .49-.56 (.52). JVest composed chiefly of plant- 

 fibres (sometimes, though rarely, ornamented with 

 lichens), often built in forks of branches. Eggs 

 .71 X -54, colored like those of C. virens. Ilab. 

 Western North America, east to Great Plains, 

 north to British Columljia and interior of British 

 America, south, in winter, through Jlexico and 

 Central America to Costa Rica.. 462. C. richard- 

 (48.) sonii (Swains.). Western Wood Pewee. 



f. Loi'cs whitish, in strong contrast with color of forehead 

 and ear-covorts; throat pure white; otherwise very 

 similar in color to C. virens, but bill much longer, 

 broader, and more flattened ; lengtji (skin) 5.60, wing 

 3.20, tail 2.60, exposed cuhnen .55, width of bill at 

 base .35, tarsus .50. JIab. Yucatan. 



C. albicollis Lawr. White-throated Wood Pewee.' 

 c*. Second quill not conspicuously (if any) longer than third, and 

 fourth not conspicuousi}- longer than fifth ; wing not more 

 than 3.05 (usually loss than 3.00). 



Above dull olive, decidedly darker on to]i of hcail, lighter 

 on rump ; wings and tail dusky, the former varied by 



> CuKtopue albicoUU L.vwii., Ann. Lye. X. Y. Ac. Sci. iii. No. 5, Jan. 5, 18S5, 156. 



