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dark form of P. mongolicus. Of the next species, by the kind- 
ness of yourself and Mr. Dresser, I have had an opportunity 
of seeing the specimens brought to England by Dr. Severt- 
zoff, and am satisfied it is the same as the one I named P. 
insignis in my monograph. I had but an imperfect skin to 
describe from, without any head or neck, and I erred in sup- 
posing that the adult would not have any white ring. The 
specimen belonging to Mr. Dresser, a male, not having its 
adult plumage, has, indeed, no ring; but the adult seems to 
have an imperfect one, not nearly so well defined as that in 
P. mongolicus. The third species of Dr. Severtzoff, P. per- 
sicus, I have not seen; but, from the déscription, I esteem 
it to be the P. shawi of my monograph, which, though similar 
in plumage to P. colchicus, has the white wings of P. mon- 
golicus and P. insignis. 
I am yours, &e., 
London, 14th December, 1875. D. G. Exuior. 
S1r,—I find, on looking over my “ List of Birds collected 
or observed during a journey into the Matabili country in 
1873,” that a few corrections and additions are required. 
First, the information under “ Gyps kolbii” (Ibis, 1874, 
p- 358) refers to “ Lophogyps occipitalis.”’ 
Second, that under “ Gyps rueppelli ” refers to “ Gyps 
kolbii.”’ 
POLIOHIERAX SEMITORQUATUS. 
Seen on two or three occasions in the Bamangwato district. 
BusBo MACULOSUS. 
I flushed one of these Owls off her nest in the rocks among 
the high hills that le to the back of Strasbourg, the chief town 
of the Bamangwato. The nest was merely a hole scooped 
out in the bank and sheltered by a rock; in this were lying 
two eggs, with no lining whatever; the bird sat until I almost 
trod on her. 
E.RYTHROPUS VESPERTINUS ? 
One day in November I saw an enormous quantity of Hob- 
bies, apparently this species, at a place called Holtfontein, in 
the west of the Transvaal. 


