BIRDS OF NORTH AND MIDDLE AMERICA. 468 



by slightly more than length of exposed cvilnien; seventh, eighth, or 

 sixth, seventh and eighth, primaries longest, ninth equal to or longer 

 than fifth, tenth (outermost) shorter than first (shorter than seconda- 

 ries). Tail equal to or longer than distance from bend of wing to end 

 of secondaries, slightly rounded or double-rounded, the rectrices rather 

 narrow basally, widening more or less terminally. Tarsus longer than 

 middle toe with claw, much less than one-fourth as long as wing, its 

 scutellation typically (sometimes ultra-) exaspidean, the divisions of 

 the acrotarsium fairly distinct; middle toe, without claw, more than 

 half as long as tarsus, its basal phalanx completely united to outer toe, 

 about half united to inner toe; outer toe, without claw, reaching to or 

 beyond middle of subterminal phalanx of middle toe, the inner toe 

 slightly shorter; hallux about as long as inner toe, slightly stouter, its 

 claw shorter than the digit; all the claws moderately curved, sharp, 

 compressed. 



CoZorr/iion-.^Above plain olive-green, the pileum sometimes black, 

 sooty brown, or gray, the wing-coverts tipped with pale yellow, light 

 tawny, buffy, or whitish; beneath pale yellow, more or less tinged 

 with olive anteriorly (the throat sometimes grayish) or grayish white 

 tinged with pale yellow posteriorly. 



Nidification. — (Unknown?.'*) 



Range. — Southern ^lexico to Peru, Bolivia, Brazil, and Guiana. 

 (About fifteen species and subspecies.) 



KKY TO THE SPECIES LEPTOPOGON. 



a. Throat and chest light olive, distinctly different from color of abdomen; pileum 

 brown or dark slaty, conspicuously contrasted with olive-green of back; larger 

 (wing, 58-69 mm.). 

 b. Pileum brown; tail olive-brownish. (Southern Mexico to Panama.) 



Leptopogon pileatus (p. 463) 

 bb. Pileum dusky gray or slate color; tail deep grayish brown with olive-green 

 edgings. (Costa Rica to Venezuela, Peru, and southwestern Brazil.) 



Leptopogon superciliaris (p. 465) 



aa. Throat and chest pale yellow, like abdomen (the chest faintly tinged with olive; 



pileum olive-green, concolor with back; smaller (wing less than 55 mm.). 



(Panama.) Leptopogon flavovirens (p. 467) 



LEPTOPOGON PILEATUS Cabanis. 

 BROWN-CAPPED LEPTOPOGON. 



Adults (sexes alike). — Pileum sepia brown, fading on hindneck into 

 olive-sepia; back, scapulars, and rinn]> plain olive-green; upper tail- 

 coverts and tail broccoli brown to russet-brown, the latter with russet 

 or light olive-brown edgings; lesser wing-coverts olive; middle and 



a Eggs immaculate white (Allen, Bull. Am. Mus. N. H., v, 1893, 153). 



