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fourth. Adult: —Head, neck, jugulum, and entire upper parts uniform 
plumbeous-black, the bases of the feathers pure white; this somewhat 
exposed on the occiput and nape. Tail deep black, crossed at about the 
middle of its exposed portion by a narrow zone of white, and anterior 
to this by narrower and less complete bauds of the same. Lower parts, 
from the jugulum back, white, narrowly barred with black over the 
eutire surface. 
This very rare, and, so far as regards the coloration of the lower parts, 
somewhat aberrant, species, we have not seen, and consequently draw up 
our diagnosis from the characters furnished by its describers. 
