Key to the Species. 
A. Lores blue 
B. Lores yellow * 
a. Orange patch on abdomen very 
b. Wing-coverts all dark blue 
c. Upper wing-coverts light blue. . 
N. petrophilus. 
pronounced • • N. chrysogaster. 
. . . . . . N. chrysostomus, 
. . . . . . N. elegans* 
\ 
* The lores in chrysogaster never seem to be as yellow as those of the other two species ; being more greenish 
yellow. 
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