BIRDS OF NORTH AND MIDDLE AMERICA. 4:11 



edging and the olive ground colbr), the black sometimes prevailing over 

 the olive or olive-brown; middle and greater wing-coverts tipped with 

 white, forming two bands; three to four outer tail-feathers with 

 large terminal spaces of white, chiefly on inner webs; the outermost 

 rectrix with the outer web edged with white (sometimes mostly white), 

 and with the white space on inner web 18.29-38.10 (averaging 28.45) 

 in length; breast and abdomen white; sides and flanks rufous-tawny 

 (rarely varying to cinnamon-buff), occasionall}' with dusky spots or 

 bars; anal region and under tail-coverts paler cinnamon-tawnj^ or 

 ochraceous-bufl:; bill black (mandible paler in winter); legs and feet 

 brownish; length (skins), 185.93-208.79 (199.14); wing, 80.52-92.71 

 (87.12); tail, 91.95-106.17 (100.08); exposed culmen, 13.97-15.49 

 (14.73); tarsus, 27.43-31.24(29.72); middle toe, 18.29-21.08 (19.81); 

 hind claw, 10.16-14.22 (12.19); white on lateral tail-feathers, 18.29- 

 88.10 (28.45).^ 



Adult female. — Similar to adult male, but black of throat and chest 

 duller, more sooty, sometimes dark soot}' bi'own rather than sooty 

 black; pileum dark sooty brown or olive-brown, usually streaked with 

 blackish; back and scapulars with more of olive or olive-brown and less 

 of black than in the male; length (skins), 184.15-204.22(196.34); wing, 

 76.20-88.39 (83.31); tail, 86.87-100.33(95.25); exposed culmen, 13.46- 

 15.49 (14.73); tarsus, 27.43-30.48 (29.21); middle toe, 18.29-20.83 

 (19.81); hind claw, 10.67-12.70 (11.94); white on lateral tail-feathers, 

 28.86-31.75 (27.69).' 



Young male. — Above similar to the adult male but duller, the 

 darker areas sooty rather than black; median portion of throat and 

 chest, together with breast and abdomen, dull pale buffy, streaked with 

 blackish; sides of throat and chest mainly blackish; sides and flanks 

 light buffy brownish, streaked with blackish; under tail-coverts brown- 

 ish buffy. 



Young female. — Much browner than young male, the pileum and 

 hindneck olive-brown, the back and scapulars more fulvous brown, 

 broadlj^ streaked with black and pale fulvous or brownish buffy; under 

 parts deep dull buffy or pale clay color, the lower throat and chest 

 heavily streaked with dusky, sides of throat mainly dusky, and sides 

 narrowly streaked with the same. 



Central and southern portions of Mexican plateau, in States of San 

 Luis Potosi (Jesus Maria), Zacatecas (Plateado), Hidalgo (Keal del 

 Monte; El Chico; Tulancingo; San Augustin; Sierra de Pachuca; 

 Irolo), Puebla (Chalchicomula; Tezuitlan; Mount Orizaba); Tlaxcala 

 (Mount Malinche), Mexico (Amecameca) and Guanajuato, and Terri- 

 tory of Tepic (Santa Teresa) ; southward through high mountains of 

 Oaxaca and Chiapas to highlands of Guatemala (Quezaltenango; Chi- 

 maltenango; Todos Santos). 



1 Thirty-four specimens. ' Ten specimens. 



