314 Capt. Blakiston on Birds collected and observed 
was taken; and from the same bird, which has been kindly sub¬ 
mitted to my examination by Mr. T. J. Moore, the Curator of 
this celebrated collection, I have drawn up the following short 
characters, which, when taken in conjunction with Mr. Wolfs 
figure, will, I hope, be sufficient to render the species recognizable 
without much difficulty. /fiz /c / L f- 
Accipiter pectoralis. 
Falco pectoralisj in Mus. Antverpiano. 
Supra niger, dorsi et scapularium tectricumque plumis albo mar- 
ginatis, pileo nigro immaculato: torque collari postico et 
capitis lateribus rufis: remigibus obscure fuscis: cauda 
nigra, albo quater fasciata: subtus albus, plaga rictali et 
striga mediali gutturis nigris; pectore rufo, albo variegato : 
ventre toto albo nigroque transfasciato: rostro nigro, pedibus 
flavicantibus: long, tota 17, alse 102, tarsi 2*3, rostri a 
rictu 1*1 poll. Angl. et dec. 
Hab. (ut dicitur) in America meridionals 
Mus. Antverp. et Derbiano. 
The two examples of this bird in the Derby Museum (No. 393 
and 393, a) were purchased by the late Lord Derby from 
Mr. Gould, in September 1841. They have no locality marked 
upon them. The species is very remarkable as being so nearly 
a miniature, as regards general appearance, of Spizaetus ornatus , 
although certainly a true Accipitrine. The wings reach to about 
one-half of the length of the tail; the third, fourth, and fifth 
primaries are nearly equal and longest. 
XXXIV.— On Birds collected and observed in the Interior of 
British North America . By Captain Blakiston, R.A. (Part I.) 
By the “ Interior of British North America,” I mean that portion 
of the continent lying to the north-west of Canada which may 
be said to be bounded by the western base of the Rocky Moun¬ 
tains, the 49th parallel of north latitude, Canada, Hudson’s Bay, 
and the Arctic Sea, and which has hitherto usually gone by the 
somewhat indefinite appellation of the “ Hudson’s Bay Company’s 
Territories ” and the “ Fur Countries.” 
Rather than give localities which require some amount of 
geographical knowledge to make out, I have referred to the great 
