342 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



h. Conspicuously crested; only three outer primaries reduced, their 

 shape normal; iiftli and sixth primaries longest. 



Colopteryx (extralimital)" 



hh. Not crested; lour outer primaries reduced (narrow and subfalcate, 



and seventh shorter than tenth, in adult male; third and fourth 



primaries longest Atalotriccus (p. .373) 



ee. Tail much less than half as long as wing Perissotriccus (p. 376) 



dd. Without the combination of characters given under d. 



e. Small forms (wing less than 62 ipm.), with tarsus not less than one-third 



as long as wing, and bill very broad and flat, with distinctly convex 



lateral outlines, its width at frontal antite much greater than distance 



from nostril to tip of maxilla. 



/. Feathers of chin and frontal antia> with distinct Ijristly tips; tarsi and 



toes more slender: basal phalanx of middle toe wholly united to inner 



toe; tail much less than half (about two-fifths) as long as wing, with 



rectrices relatively narrower; outei-most (tenth) primary longer than 



fifth Placostomus (p. 378) 



ff. Feathers of chin without, those of frontal antise with, very indistinct (if 

 any) bristly tips; tarsi and toes stouter; basal phalanx of middle toe 

 not wholly united to inner toe; tail nearly half to slightly more than 

 half as long as wing, the rectrices relatively broader; outermost (tenth) 

 primary not longer than third (usually shorter than first). 



Platytriccus (p. 380) 

 ee. Larger forms (wing more than 62 mm.) or else without the combination of 

 characters given under e. 

 J. Bill short, broad, and flat, its width at posterior end of nostril equal to or 

 greater than length of gonys, the latter equal to or greater than distance 

 from nostril to notch of maxillary tomium. 

 (J. Width of bill at frontal antise much greater than distance from nostril to 

 tip of maxilla, nearly equal to length of exposed culmen; tail much 

 less than two-thirds as long as wing; outermost (tenth) primary equal 

 to fifth; pileum crested; color olive-brown above, the wings rufes- 

 cent, pale yellow below with throat white and chest brown. 



Platyrinchus (extralimital ) b 

 gg. \\idth of bill at frontal antia? not greater than distance from nostril to 

 tip of maxilla, decidedly less than length of exposed culmen; tail 

 more than three-fourths as long as wing; pileum not crested; color 

 olive-green above (sometimes gray on head), paler or yellowish 

 below. 



aColopterus (not of Erichson, 1842) Cabanis, in Ber. Verh. Ak. Berlin, 1845, 216. 

 (Type, Motacilla galeata Boddaert.) — Colopteryx Ridgway, Proc. U. S. Nat. Mus., sig. 

 33, Aug. 6, 1888, 519. (New name for Colopterus Cabanis, preoccupied. By mere 

 inadvertence the type was given by me as C. pilaris Cabanis; but since it was unques- 

 tionably and clearly my intention to merely replace a preoccupied name and not to 

 name a new genus this slip can not justify the view, possibly held by some .strict ad- 

 herents of the principle that action should prevail over intention in matters of nomen- 

 clature, and that therefore the type of Colopteryx must necessarily be C. pilaris. 



b riatyrinchus Desmarest, Hist. Nat. Tangaras, Manakins, et Todiers, 1805, pi. 72. 

 (Type, Todus platyrinchus Gmelin.) — Plalyrhynchos (emendation) Vieillot, Analyse, 

 1816, 39. — Platyrhynats Descourtilz, Orn. Bres., 1856, 22. — Platyrhynchns (emenda- 

 tion) Swainson. 



