Mr. R. B. Sharpe’s Catalogue of Accipitres. 321 
fact of the white bars on the under surface having become 
narrower. The following particulars are given respecting the 
iris &c. in this example :—“ Iris blanc; peau nue autour des 
yeux bleu-verdatre ; avec une tache jaune devant l’ceil; pattes 
orangées,”’ 
The only example of this species in the fourth, or final, 
dark slaty-grey dress unmingled with white on the under 
surface, which has come under my notice, is one which was 
obtained in Peru by the traveller Tschudi, and is now pre- 
served in the Norwich Museum. The plumage of this speci- 
men closely agrees with that of the final stage of R. wncinatus, 
except that the tail still shows some slight remains of the 
upper white band, and that the broad central tail-band is 
white only on the inner webs of the rectrices, that portion of 
their outer webs being a somewhat pale grey. ‘This example 
is rather a small one, and most probably a male; though so 
old a bird, the measurement of its culmen is less than that of 
any other specimen that I have examined, being only 17 inch 
along the curve. 
To complete the parallel between the coloration of R. un- 
cinatus and R. megarhynchus, the melanistic phase of plumage 
appears to be of a similar character in both species. Such a 
dark-brown specimen of R. megarhynchus from Peru is de- 
scribed by M. Taczanowski in the P.Z.S. for 1874, p. 551 
(third paragraph). This specimen seems to have differed but 
little from ordinary ones in the colour of its unfeathered 
parts, as to which M. Taczanowski quotes the following note 
from the pen of M. Jelski, who obtained it :—“ La peau nue 
devant les yeux est d’un jaune presque orangé; la cire est 
jaune verdatre tirant un peu en bleu sur les cétés, olivatre plus 
foncée au dos et au-dessus des narines. La mandibule supé- 
rieure est noire, inférieure jaune. Les pattes jaunes de carotte ; 
les ongles noirs. Liris blanc avec une légére nuance jaunatre.” 
The only remaining species of the genus Regerhinus, R. 
wilsoni, appears to be peculiar to the island of Cuba; it is 
one which has not come under my personal observation, but 
which would seem to be readily distinguishable from its two 
congeners by the colour of its bill, 
SER. IV.—VOL. IV, Z 
