TROGONIDAE 
a* Tail feathers not tipped with white* 
Trogon massena 
aa* Tail feathers tipped with vhite. 
b. Under parts partly yellow. 
£. Larger, wing 130-146 mm#, outer rectrices 
without distinct white bars* 
Trogon melanocephalus 
cc » Smaller, wing 110-134 mm#, outer rectrices 
barred distinctly with white. 
Trogon violaeeus braceatus 
bb# Under parts partly red# 
£. Back green 
dm Rectrices not barred with white. 
Trogon mexicanus d 
dd # Rectrices distinctly barred with 
white. 
£. Tail longer 160-185 mm. with white 
bars wider than black 
Trogon elegans d 
ee* Tail shorter, 127-160 mm., with 
white bars much narrower than black 
interspace. Trogon puella d 
cc» Back brown. 
d. A conspicuous auricular spot of white 
Trogon elegans 9 
dd . Ho white auricular spot. 
£. Breat brown, lateral rectrices broadly 
barred with white on outer web, larger 
wing 136-157 mm. 
Trogon mexicanus 9 
ee. Breast red, broadly banded with white 
smaller wing 115-138 ram. outer web of 
outer rectrix white mottled with black. 
Trogon puella $ 
