Mr. R. B. Sharpens Catalogue of Accipitres. 461 
remarks in ^Tlie Ibis ^ for 1865, pp. 27, 28, and for 1866, 
pp. 246,247, also to Professor SchlegePs, in the Supplementary- 
Catalogue of the ^ Museum des Pays-Bas,^ A. Accipitres, 
pp. 119-123 (in which some interesting details as to variation 
of size are also given), to Lord Tweeddale^s, in his List of 
the Birds of the Philippine Archipelago,’^ published in the 
Transactions of the Zoological Society, vol. ix. p. 142, and 
lastly to a paragraph devoted to this subject at p. 314 of Mr. 
Sharpe’s volume. 
Some differences are also perceptible in the colour and 
intensity of the dark shaft-marks on the rufous mantle, these 
varying in different localities from reddish brown to black; 
and another very variable feature in the plumage of these 
birds will be found in the transverse, but usually more or 
less imperfect, brownish-black bars which occur in most 
adult specimens on the inner webs of the primaries, secon¬ 
daries, and tertials, or some of them, and sometimes also on 
those of the rectrices other than the central pair : these bars 
are, for the most part, assumed at the time of the bird first 
attaining its adult dress; but I have seen one moulting spe¬ 
cimen (marked N in the following list) in which these bars 
have evidently been assumed on the primaries at a later 
period; I suspect, however, from other specimens which I 
have examined, that they usually disappear with advan¬ 
cing age. 
Some additional information may perhaps be gleaned from 
the following memoranda of details, taken from the adult, or 
nearly adult, specimens of H. Indus^ H. intermedius, and 
H. girrenera preserved in the Norwich Museum, and which 
I here distinguish by a letter for facility of reference :— 
A, from Poonah, India. This, as regards the dark shaft- 
marks, may be taken as a typical adult example of H. Indus ; 
the transverse bars exist on the secondaries and tertials, but 
not elsewhere. 
B, from Cashmere. A moulting specimen, the old plu¬ 
mage being adult as well as the new, but greatly faded in its 
rufous portions, which have assumed in consequence a curious 
tinge of pale pinkish brown; the old secondaries and tertials 
