140 
BLUE-GREEN HUMMING-BIRD. 
green on the belly ; the vent is white, and forms a 
distinct mark between the green of the belly and 
brown of the under tail-coverts. The young have 
the blue of the throat less clear, and the under parts 
more mingled with gray ; the bill is also brown, where 
it is yellow in the adults. 
The female has not been discovered. 
