BIEDS OF NORTH AND MIDDLE AMERICA. 671 



one-half) the distance from nostril to tip of maxilla, nearly double its 

 width at same point; culmen (from base) equal to or longer than 

 middle toe without claw, the basal portion (mesorhinium) elevated and 

 strongly decurved posteriorly or arched, the remaining portion 

 straight to near tip, where slightly decurved; gonys much shorter 

 than distance from nostril to tip of maxilla, straight, ascending 

 terminally, prominent basally; mandibular rami (unfeathered portion) 

 equal to or longer than gonys, strongly bent and deflexed posteriorly; 

 maxillary tomium straight, more or less distinctly notched subtermi- 

 nally, the rictus very strongly, but not abruptly, deflexed. Nostril 

 very small, circular, rimmed, in central portion of nasal fossa. Eictal 

 bristles obvious but very short; frontal feathers erect, distinct, but 

 without bristly tip. Wing short, very concave beneath, much 

 rounded; seventh, sixth, and fifth primaries longest; eighth equal to 

 or longer than fourth; ninth shorter than first (sometimes shorter 

 than secondaries), not more (sometimes less) than twice as long as 

 tenth. Tail about half as long as wing, much rounded, the rectrices 

 broadly rounded at tip. Tarsus much longer than culmen, about two- 

 fifths as long as wing, or less, the acrotarsium distinctly scutellate, 

 the planta tarsi booted; middle toe, with claw, shorter than tarsus 

 (sometimes nearly as long); outer toe (without claw) reaching to 

 slightly beyond subterminal joint of middle toe, its claw falling far 

 short of base of middle claw; inner toe slightly shorter than outer; 

 hallux (without claw) as long as outer toe (without claw), its claw 

 much shorter than the digit; basal 'phalanx of middle toe adherent to 

 both lateral toes for much the greater part of its length. 



Coloration. — Above brown,, the remiges and rectrices usually barred 

 with dusky; beneath pale brownish or grayish, the throat tawny or 

 rufous-chestnut, the flanks and under tail-coverts brown; sides of 

 neck sometimes streaked with black and white." 



Range. — Southern Honduras to Amazon Valley and western 

 Ecuador. 



KEY TO THE SPECIES AND SUBSPECIES OF LEDCOLEPIS. 



a. Eemiges and rectrices without blackish bars. 

 h. Lighter colored; above deep brown (between mummy and eepia) ; under parts 

 of body russet-brown, becoming paler, more cinnamomeous, medially. (East- 

 ern Peru.) Leucolepis thoracicns (extralimital)B 



"The single Central American species and its nearer South American allies have 

 no black nor white streaks on side of neck, which is bright chestnut or chestnut- 

 rufous, like auricular and malalr regions, throat and chest. 



^ Oyphmhirms ihorcxciaus Tschudi, Wiegmann's Archiv. fiir Natiirg., 1844, 282; 

 Sharpe, Cat. Birds Brit. Mus., vi, 1881, 294. 



The U. S. National Museum possesses one of Tschudi' s original specimens, an 

 adult in good condition. 



