Note on Accipiter stevensoni and Scops lempiji. 217 
mage, like its congeners P. apivurus and P. ptilorhynchus ; 
and, judging from the few specimens I have seen, the im- 
mature dress differs from the adult but very slightly, if at 
all; probably, however, there will be found, on comparison 
of a sufficient series, some little difference at different ages 
in the markings of the tail and quill-feathers of the wings. 
The head, so far as I have observed, is dark grey on the sides 
only, and chiefly on the lores. Some specimens are crested, 
others are not so; the longest crest I have seen in this species 
measured 2 inches, and was on a specimen in the possession 
of the late Lord Tweeddale. 
On comparing the dimensions of four specimens, which I 
have measured, with those furnished by Mr. Sharpe, I find 
that in P. celebensis the wing-measurement varies from 14] 
to 15°5 inches, the tarsus from 1:9 to 2°25, and the middle 
toe s. u. from 1°75 to 2. 
X VII.—WNote on Sumatran Specimens of Accipiter stevensoni 
and Scops lempiji. By J. H. Gurney. 
In the preceding article I have referred to a specimen of 
Pernis ptilorhynchus, kindly lent to me by Lieut. Wardlaw 
Ramsay, who received it in a collection from the hill region 
of Western Sumatra. The same collection contained two spe- 
cimens of Accipiter stevensoni, a species which, I believe. has 
not previously been recorded from Sumatra: one of these is 
an adult male, closely corresponding with the type specimen 
in the Norwich Museum; the other I consider to be an 
immature female, though it was marked by the collector 
as a male. 
The collection also contained a specimen of the large race 
of Scops lempiji, noticed by me at p. 471 of ‘The Ibis’ for 
1879. This specimen is slightly smaller than the two Suma- 
tran examples there recorded, and is somewhat less thickly 
feathered on the lower part of the tarsus; the contrast between 
the dark and light portions of the plumage is also more 
marked, especially on the primaries; its measurements are, 
wing 6°8 inches, tarsus 1°5, middle toe s. u. °9. 
SER. IV.—VOL. IV. Q 
