352 
Mr, J. H. Gurney^s Notes on 
Motacilla viRiDis, Gmel. 
The Grey-headed Wagtail arrived in flocks on the Arctic 
circle on the 5th of June, and soon became extremely abun¬ 
dant. It does not seem to extend its range beyond the limit 
of forest-growth_, and disappeared about lat. 69°. 
Motacilla citreola^ Pall. 
This beautiful bird was the first of the yellow Wagtails to 
arrive at our winter-quarters. I secured the first example on 
the 4th of June, and afterwards found it very abundant on 
the tundra as far north as we went. 
Motacilla melanope (Pall.). 
One solitary example of the Grey Wagtail fell to my gun 
on the 6th of June. As this is the first time that this bird 
has occurred within the Arctic circle, so far as I am aware, 
it may be looked upon as an accidental occurrence. I may re¬ 
mark that my bird, with a tail measuring 3‘75 inches, is inter¬ 
mediate in form between the eastern and western varieties. 
N 
[To be continued.] 
XXIV.— Notes on a ‘Catalogue of the in the British 
Museum,^ by P. Bowdler Sharpe (1874). By J. H. Gurney. 
[Continued from p. 164.] 
Before referring to the genus Helotarsus, to which I shall 
next have occasion to advert, I am desirous of briefly no¬ 
ticing an additional specimen of Circaetus cinereus which 
has recently been acquired by the Norwich Museum. 
This example, which is from Abyssinia, agrees closely in 
coloration with that from Nubia described in my last paper 
(antea, p. 162, no. 18), and, like it, has no white bases to the 
feathers on the under surface. 
Its principal measurements are :—Wing 22*2 inches, tarsus 
3*9, middle toe s. u. 2*4, culmen 2*1. 
I have already mentioned that I consider the genus Helo¬ 
tarsus to be an abnormal member of the Circaetine group; 
and I am desirous of offering a few remarks upon it, as sup¬ 
plementary to those contained in Mr. Sharpens volume. 
