Ly Rs SMITHSONIAN MISCELLANEOUS COLLECTIONS [voL. 48 
d.—Tail shorter, about three-fourths of wing....Baeopogon 
d’.—Tail longer, about nine-tenths of wing, or more. 
e.—Tarsus less than one and one-fourth times the length 
of exposed culmen. 
f.—Culmen straight or slightly concave, except at 
decurved tip; gonys decidedly ascending; bill 
about equal in height and breadth at anterior 
edge of nostrils, its height at base much less 
than one-third of exposed culmen. 
Argaleocichla 
f.—Culmen curved from base; gonys almost 
straight; bill higher than broad at anterior 
edge of nostrils, its height at base about equal 
to one-third of exposed culmen....Acritillas 
e.—Tarsus more than one and one-fourth times the 
length of exposed culmen. 
f—Bill shorter and relatively stouter, somewhat 
depressed, equal in height and breadth at 
anterior edge of nostrils, the culmen curved 
from base; nuchal hairs shorter and not 
brariclted hyi ence e este te eee ela Ixonotus 
f’—Bill longer and relatively more slender, some- 
what compressed, higher than broad at ante- 
rior edge of nostrils, the culmen almost 
straight except at tip; nuchal hairs longer 
and: mutch: bragched ay aciis:. Ms Phyllastrephus 
