166 
GROOVE-BILLED BARBUT. 
Pogonias sulcirostris, Leach. 
Black ; lower part of the back and sides of the body white, 
under parts crimson ; breast with a black bar ; bill, in the 
adult, with two distinct grooves on each side ; orbits naked. 
Pogonias sulcirostris, Leach, Zool. Miss . — Pogonias Isavirostris, 
Leach, Auctorum. 
Western Africa seems almost the peculiar habita- 
tion of a very singular race of Barbuts, whoso bills, 
of enormous thickness, are armed with tooth-like 
processes. The Barbuts, according to Mr. Burchell, 
climb trees something in the manner of woodpeckers, 
and perforate them to extract the insects hid in the 
bark ; hut further than this, their natural history is 
entirely unknown : the stiff bristles round the bill, 
and which in the present species are particularly 
strong, is no doubt intended to confine the struggles 
of their captured prey. 
Upon attentively comparing specimens of Dr. 
Leach’s Pogonias Iwvirostris with others of his 
sulcirostris, we feel persuaded that they are hut one 
species in different stages of growth ; lamrostris we 
consider as the young bird, which has not yet ac- 
quired either the teeth or the grooves which so re- 
