BIRDS OF NORTH AND MIDDLE AMERICA. 259 
KEY TO THE SPECIES AND SUBSPECIES OF PICOLAPTES. 
a, Breast essentially bicolored, the very pale buff or buffy white median area on 
each feather very broad, the edges of the feathers mostly or wholly black; buffy 
or whitish streaks on pileum and hindneck broader; back more grayish brown. 
(Western and central Mexico.)..........-.--.--- Picolaptes leucogaster (p. 259). 
aa. Breast distinctly tricolored, the feathers broadly edged with brown, this much 
broader than the black line edging the narrower buffy mesial area; buffy streaks 
on pileum narrower; back more cinnamomeous brown. 
b. Markings on pileum guttate or rhomboid (spot-like). (Picolaptes affinis.) 
c. Under parts with stripes narrower, less distinct posteriorly; throat paler buff 
(not deeper than color of stripes on breast, etc.). (Southern Mexico to 
Guatemala)... ...5 ccs e 2 de ecteeeecesewees Picolaptes affinis affinis (p. 261). 
ce. Under parts with stripes broader, more distinct posteriorly; throat deeper 
buff than color of stripes on breast, etc. (Costa Rica and western Panam4.) 
Picolaptes affinis neglectus (p. 263). 
bb. Markings on pileum linear (streak-like). (Picolaptes lineaticeps.) 
c. Pale buffy streaks on back and under parts narrower, the former more acicular; 
throat paler and less extensively buffy. 
d. Coloration paler, the ground color of pileum lighter sepia brown, back, 
etc., light cinnamon-brown; streaks on upper back smaller, without 
distinct blackish edges. (Eastern Panamé.) 
Picolaptes lineaticeps lineaticeps (p. 264). 
dd. Coloration darker, the ground color of pileum dark sooty brown, back 
russet-brown; streaks on upper back larger, distinctly edged with black- 
ish. (Western Panamé to Nicaragua.) 
; Picolaptes lineaticeps compressus (p. 265). 
cc. Pale buffy streaks on back and under parts broader, the former more cuneate; 
throat more deeply and extensively buff. (Northern Honduras to southern 
MOXICO) \edassariasre'eieiaare sete ieleiee eit: Picolaptes lineaticeps insignis (p. 266). 
PICOLAPTES LEUCOGASTER (Swainson). 
WHITE-STRIPED WOODHEWER. 
Adults (sexes alike)—Pileum and hindneck deep olive-brown or 
sepia, each feather with a broad guttate or elliptical streak of buff 
or buffy white, margined with blackish; back, scapulars, and wing- 
coverts buffy olive-brown (nearly broccoli brown), the upper back 
usually with a few streaks of buff (with or without blackish margins) ; 
rump, upper tail-coverts, tail, and remiges deep cinnamon-rufous or 
rufous-chestnut, the remiges, however, passing basally into brownish 
(like color of wing-coverts, etc.), and terminal portion of inner 
webs of primaries dusky; orbital ring and supra-auricular stripe 
white or buffy white, the feathers of the latter narrowly margined 
with black; a narrow postocular stripe of blackish or dusky, nar- 
trowly streaked with white or pale buff; the greater portion of 
auricular region buffy white or very pale buff, narrowly streaked 
with dusky; suborbital and malar regions, chin, and throat buffy 
white, the. lower throat margined on each side by one or more 
streaks of black or dusky; the feathers of extreme lower throat 
(sometimes those of suborbital region and posterior portion of 
