BIRDS OF NORTH AND MIDDLE AMERICA. 329 



ascertained they lay their eggs in cavities of trees, and the eggs are 

 immaculate white with a rather glossy surface. 



KEY TO THE GENERA OF RAMPHASTID^. 



a. Nostrils opening posteriorly, behind the elevated, truncate, posterior margin of the 

 maxilla; tail much shorter than wing, fan-shaped, truncate or very slightly 

 rounded, the rectrices widening terminally, with tip subtruncate; two outer 

 primaries attenuated terminally; upper parts uniform black, the upper tail- 

 coverts white, yellow, orange, or red; throat and foreneck white, yellow, or 

 orange, bordered posteriorly by a band (more or less broad) of red. 



(Ramphastinse.) 



Ramphastos (p. 330). 



na. Nostrils opening vertically or laterally; tail nearly as long as to longer than wing, 

 wedge-shaped, strongly graduated, the rectrices narrowing terminally, with tip 

 narrowly rounded (sometimes subacuminate) ; outer primaries not attenuated 

 terminally; upper parts not uniform black, the upper tail-coverts neither white, 

 yellow, nor orange, though sometimes red; throat and foreneck not white (or 

 else rest of underparts green or pale blue), yellow (or else rest of imderparts 

 yellow with middle portion red), nor orange. (Pteroglossinae.) 

 b. Bill more tumid, the culmen more or less ridged (subcarinate), except basally; 

 sides of maxilla not hollowed out or concave, never ridged nor grooved; general 

 color not green. 

 c. Tail longer than wing; auricular feathers not elongated, nor different in color 

 from malar region, throat, etc.; breast neither black, tawny, nor gray; adult 

 males without a flank patch of yellow or orange. 

 d. Bill relatively tMcker, much broader basally, and more compressed termi- 

 nally, its width at base more than half the length of gonys, the culmen 

 more compressed (distinctly subcarinate for terminal half or more) ; colora- 

 tion plainer, the tliroat not black or dark chestnut, underparts without 

 red (except, sometimes, under tail-coverts), and rump not red (or else rest 

 of upper parts yellowish oKve). 

 e. Underparts pale blue passing into white on throat and sides of head, the 

 under tail-coverts red and thighs chestnut; pileum and hindneck black; 



lower rump light yellow Andigena (extralimital).a 



ee. Width of bill at base not greater than its depth at same point; underparts 

 saffron yellow; upper parts yellowish olive, the rump red. 



Baillonius (extralimital).& 

 dd. Bill relatively narrower, less broad basally, less compressed terminally 

 (width at base decidedly less than half the length of gonys), the culmen 

 more rounded; coloration more varied, the throat uniform black or dark 

 chestnut (or else underparts yellow with a red band across middle and 

 feathers of head peculiar), the rump red. 



f' Andigena Gould, Proc. Zool. Soc. Lend., 1850, 93. (Type, Pteroglossus hypo- 

 glaucus Gould.) — Ramphomelus Bonaparte, Ateneo Italiano, ii, 1854, 119 (Consp. 

 Volucr. Zygod. , 1854, 4). (Type, Pteroglossus nigrirostris Waterhouse.) — Eamphomelas 

 (emendation) Bonaparte, Notes Orn. Coll. Delattre, 1854, 54, footnote. 



Colombia to Peru and Bolivia. (Five species.) 



b Baillonius Cassin, Proc. Ac. Nat. Sci. Phila., xix, 1867, 114. (Type, Ramphastos 

 hailloni Vieillot.) — Rhagohorus Heine, in Heine and Reichenow, Nom. Mus. Hein. 

 Orn., 1890, 229. (To replace Baillonius Cassin, on grounds of purism!) 



Southeastern Brazil. (Monotypic.) 



