Mr. R. B. Sharpe’s Catalogue of Accipitres. 425 
caligatus (the Spizaetus limnaetus of Mr. Sharpens Catalogue) , 
■which is also usually, though not invariably, a crestless species, 
or with the crest but very slightly developed - *. 
This Hawk-Eagle occurs under two very distinct phases 
of plumage, if, indeed, both be really referable to one species : 
these are the white- or pale-fulvous-headed and white-breasted 
phase figured at ph 127 of Temminck's f Planches Coloriees/ 
under the name of Falco niveus , and the fuliginous or melan- 
istic phase figured at pi. 134 of the same work, and also on 
pi. 36 of Plorsfield's f Zoological Researches in Java - ’ under 
that of Falco limnaetus; besides which, specimens occur appa¬ 
rently intermediate between these two extremes of coloration. 
All three of the above-mentioned phases are also figured 
in SchlegePs * Vaik-Vogels/ in which very useful work the 
pale-headed phase is represented on pi. 6. fig. 2, from Flores f, 
and on pi. 8. fig. 2, from Java ; the intermediate on pi. 6. fig. 3, 
from Java, and on pi. 7. fig. 1, from Borneo ; and the wholly 
fuliginous on pi. 8. fig. 1, from Java. 
Mr. Sharpe describes the latter phase as the adult plumage 
of the species; but it appears to be certain that it is sometimes 
assumed from the nest: one of the figures in SchlegePs ‘ Valk- 
Vogels' (pi. 8. fig. 3) represents a nestling from Java in 
which the fuliginous plumage is immediately succeeding the 
down; this is probably the same specimen which is thus de¬ 
scribed in the f Museum des Pays Pas' (Astures, p. 11):— 
“No. 30, tres-jeune individu retire du nid, revetu en partie 
du duvet, en partie de plumes, le duvet blanc, les plumes d un 
brun-noir uniforme, Java." 
* I have never seen a specimen of either phase of colouring with a 
crest exceeding an inch in length; but instances of longer crests have been 
recorded. 
t This is the only specimen I am acquainted with from any locality 
east of Java; Professor Schlegel remarks respecting it ( c Valk-Vogels,’ 
p. 55), u il ressemble en general a la variete a teintes claires de Java, mais 
il a le blanc beaucoup plus pur, tandis que le brim du dos, des ailes, et de 
la queue est beaucoup plus fonce et presque noir.” In the Supplementary 
Catalogue of the Museum des Pays Bas (Accipitres, p. 57) the follow¬ 
ing measurements are given of this specimen—“aile 16 pouces 3 lignes, 
queue 11 pouces 3 lignes.” 
