BIRDS OF NORTH AND MIDDLE AMERICA. 775 



a Bill narrower, its width at frontal antiae much less than length of 

 exposed culmen; wing-tip short, the longest primaries exceed- 

 ing distal secondaries by only about one-third the length of 

 tarsus (or less); color yellowish olive-green above, the crown 

 with a central patch of scarlet margined on each side by a stripe 

 of black; wings with two white bands; rump and under parts 



y^.ll^^^y ' Calyptura (extralimital) « 



hh Tail more than half as long as wing. 



I. Tail not longer than distance from bend of wing to end of distal 

 secondaries. 

 j Scutella on lower portion of acrotarsium large (normal), the 

 planta tarsi with very indistinct small scutella (obsolete ex- 

 cept on lower portion). 

 k. Outer toe (without claw) longer than inner toe; pileum not 

 crested, uniform dark gray or sooty; a conspicuous white 

 supraloral streak. 



I. Tail much less than two-thirds as long as wing; exposed 



culmen shorter than middle toe with(nit claw; wings 

 without white markings Microtriccus (p. 790) 



II. Tail about four-fifths as long as wing; exposed culmen as 



long as middle toe without claw; wings with conspicuous 



whitish markings Ornithion (extralimital)b 



U. Outer toe (without claw) not longer than inner toe; pileum 



crested, yellow centrally, black laterally Tyrannulus (p. 793) 



jj. Scutella on lower portion of acrotarsium small, rough, almost 



tuberculate; planta tarsi covered nearly throughout with 



■ small, rough scutella, becoming almost tuberculate on lower 



portion . Idiotriccus (p. /96) 



a Tail much longer than distance from bend of wing to end of distal 



secondaries Elainopsis (p. 799) 



ee. Bill relatively larger, the exposed culmen longer than middle toe without 



claw. . ■ 1 -J ( 



f Aspect Tyi'annine, the bill more compressed terminally, with ridge ot 

 culmen more distinct and tip of maxilla distinctly uncinate; the 

 feathers of frontal antia^ and chin with very distinct (often conspic- 

 uous) bristly tips, the rictal bristles strongly developed. 

 g Tarsus relatively longer (longer than middle toe with claw, more than 

 one-fifth as long as wing), entirely unfeathered, the planta tarsi not 

 pycnaspidean; culmen curved terminally only. 

 h Bill longer and more compressed (its width at frontal antise much 

 less than half the length of exposed culmen), very strongly and 

 al)ruptly decurved terminally, the tip of maxilla very strongly 

 uncinate: frontal, rictal, and mental bristles very strongly devel- 

 oped; tail not longer than wing to end of distal secondaries; tarsus 

 much more than one-fourth as long as wing, the planta tarsi mostly 

 non-scutellate or with a series of small scutella along the median 



,. Attila (p. 801.) 



line ^ . ' 



hh Bill shorter and broader (its width at frontal antia^ nearly or quite 

 equal to one-half the length of exposed culmen), less strongly 

 and more gradually decurved terminally, the tip of maxilla 



aCahjptara Swaiii^JJiTF^i^i^^B^^^^A^ii, 1831, 4917 (Type, Pardalotus aistatus 

 Vieillot.) Southeastern Brazil; monotypic. t i u x 



bOrmthion Hartlaub, Journ. fur Orn., 1853, 35. (Type, 0. inerme Hartlaub.)- 

 Ornithium (emendation) Cabanis and Heine, Mus. Hein., ii, Sept., 1859, 57. Cayenne 

 to eastern Ecuador; monotypic. 



