BIRDS OF NORTH AND MIDDLE AMERICA. HTl 



one-half) the distunoo from nostril to tip of nmxilhi, nearly double its 

 ^vidth at same point; oulmen (from base) equal to or longer than 

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

 sti-oniily decurved posteriori}' or arched, the remaining portion 

 straight to near tip, where slighth' decurved; gonys much shorter 

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

 terminally, prominent ])asally; mandibular rami (unfeathered poi-tion) 

 e([ual to or longer than gonys, strongly l)ent and detlexed posteriorly; 

 maxillary tomium straight, more or less distinctly notched subtermi- 

 nally, the rictus very strongly, l)ut not abruptly, deflexed. Nostril 

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

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

 wnthout bristly tip. Wing short, very concave beneath, nuich 

 rounded; seventh, sixth, and lifth 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 w4ng, or less, the acrotarsium distinctly scutollate, 

 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: sich^s of 

 neck sometimes streaked with black and white.'' 



Range. — Southern Honduras to Amazon Valley and western 

 Ecuador. 



KEY TO THE SPECIES AND SUBSPECIES OF LEUCOLEPIS. 



a. Remiges and rectrices without blackish bars. 



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

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

 em Peru.) Leucolepis thoracicns (extralimital)^ 



«The single Central Amerit-an species and its nearer South American alHos have 

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

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



f> Ci/phorli'mua iJiomcicus Tschudi, "NViegmann's Archiv. fi'ir Natiirg., 1844, -S2; 

 Sharpe, Cat. Birds Brit. Mus., vi, ISSl, 2t)4. 



The U. S. National Museum jwssesses one of Tsduidi's original specimens, an 

 adult in good couditiou. 



