THRAUPIDAE 
a» Tail lass than two-thirds as long as wing, 
bill short, compressed# 
b# Upper parts bright green. 
Chlorophonia occipitalis 6 9 
bb. Upper parts steel blue or olive green or 
gray. 
Tanagra 
c# Crown, occiput and hindneck light blue 
T. elegantissima d, 9 
cc. Crown, occiput and hindneck not light blue# 
d# Back dark steel blue# 
e# Throat dark steel blue 
f♦ Under tail coverts yellow# 
T# affinis <S 
ff# Under tail-coverts white, sometimes 
tinged with yellow# 
T# olivacea humilis 6 
ee# Throat yellow like rest ofunderparts 
T# lauta <5 
dd . Back olive-green or olive-gray 
e. Abdomen or under tail-coverts or both 
tawny or ochraceous * 
T. gouldii d, 9 
ee # Neither abdomen nor under tail-coverts 
tawny or ochraceous like back# 
f. Back bright olive-green. 
g# Occiput olive green like back, 
h# Median underparts grayish. 
T. lauta 9 
hh. Median underparts yellow at 
least on chest like sides. 
T# olivacea humilis 9 
gg. Occiput grayish more or less dis¬ 
tinctly different from olive-green of 
affinis imm. 
ff# Back olive-grayish. 
affinis 9 
