162 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



and more pointed, the longest primaries exceeding secondaries by more 

 than length of exposed culmen; a tuft of elongated soft feathers on each 

 side of neck; larger (wing 95 mm. or more). (Pseudocolaptex .) 



Pseudocolaptes (p. 196). 

 cc. Nostril oval or roundish, not distinctly operculate. (Automolesc.) 



d. Basal phalanx of middle toe wholly united to both outer and inner toes. 

 e. Bill much longer, the exposed culmen longer than tarsus, its length from 

 nostril equal to two and a half times its depth at loral antiae. 



Hyloctistes (p. 199). 



ee. Bill much shorter, the exposed culmen shorter than tarsus, its length 



from nostril equal to but little more than twice its depth at loral antige. 



/. Bill relatively broader basally and more compressed terminally, the tip 



of maxilla abruptly and strongly uncinate; upper parts conspicuously 



streaked Ancistrops (extralimital).o 



ff. Bill relatively narrower basally and less compressed terminally, the tip 



of maxilla not abruptly noi strongly, if at all, uncinate; upper parts 



not streaked. 



g. Bill excessively compressed, its width at loral antiae equal to only 



about two-thirds its depth at same point and less than one-third 



the distance from nostril to tip of maxilla; claw of hallux very 



large, as long as the digit Anabazenops (extralimital).^ 



gg. Bill only moderately compressed, its width at loral antiae equal to 

 more than two-thu'ds its depth at same point and more than one- 

 thii'd the distance from nostril to tip of maxilla; claw of hallux 



smaller, decidedly shorter than the digit Philydor (p. 201). 



dd. Basal phalanx of middle toe not wholly united to lateral toes. 

 e. Bill relatively smaller, more slender, more compressed, its width at loral 

 antise much less than its depth at same point, not distinctly if at all 

 uncinate; shafts of rectrices softer at tip. 

 /. Bill smaller, the culmen (from base) shorter than tarsus; anterior toes 

 more extensively united basally. 

 g. Bill smaller and more slender, more decurved terminally, with gonys 



not ascending terminally Heliobletus (extralimital).c 



gg. Bill larger and stronger, less decurved terminally (except at ex- 

 treme tip), with gonys strongly ascending terminally. 



Xenicopsis (p. 205). 

 ff. Bill larger, the culmen (from base) longer than tarsus; anterior toes less 



extensively united basally Automolus (p. 211). 



ee. Bill larger and stouter, less compressed, its width at loral antiae nearly 

 equal to its depth at same point, distinctly uncinate; shafts of rectrices 

 more rigid at tip Rhopoctites (p. 222). 



o Ancistrops Sclater, Cat. Am. Birds, 1862, 157. Type, Anabates lineaticeps Sclater 

 = Thamnophilus strigilatus Spix. (Upper Amazon Valley; monotypic.) 



b Anabazenops Lafresnaye, Diet. Univ. d'Hist. Nat., i, 1841, 411. Type, Sitta 

 fusca Vieillot. — Anabatoides Burmeister, Syst. Ueb. Th. Bras., iii, 1856, 23. Type, 

 Sitta fusca Vieillot. (Southeastern Brazil; monotypic.) 



c Heliobletus Reichenbach, Handb. der Spec. Orn., 1853, 201. Type, Dendro- 

 colaptes superciliosus Lichtenstein. (Southeastern Brazil; monotypic.) 



