hh. Commissure not distinctly angulated or 
deflexed basally; mandibular tomium not 
distinctly elevated, never angulated nor 
toothed, postmedially (or if elevated the 
maxillary tomium not abruptly deflexed 
basally)♦ 
gg . Rictal bristles obsolete; maxillary 
tomium without subterminal notch; ,if 
bill stout or wedge-shaped the nostrils 
not hidden by antrorse plumules, 
Icteridae . 
ff. Bill slender, or if relatively deep, 
compressed and with culmen regularly or 
distinctly curved; if approaching a 
conoidal shape the basal depth not more 
than half the distance from nostril to 
tip of maxilla and the commissure not 
angulated or deflexed basally, 
■- '• V -j" . / ■ - *■ * .? , ' • ' * • 
g. Bill much longer than head, subulate, 
slightly decurved terminally, or else 
slender-conoid with tip acute; if the 
latter and not decurved terminally, the 
tail decidedly longer than distance from 
Dend of wing to tip of secondaries, 
Coerebidae. 
gg . Bill always shorter than the head, 
subulate, slender-conoid, or rather 
stout, but compressed, never decurved; 
if acute at tip the tail not longer 
than distance from bend of wing to 
tip of secondaries; if rather stout 
the culmen decidedly but gradually 
curved, 
MniotiItidae. 
