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XIX. On some New or little-known Species of Accipitres, in the Collection of the Norwich 
Museum. By Puitie Lurvey Scrarer, M.A., F.L.S., &e. 
Read March 9, 1858. 
AT the request of Mr. J. H. Gurney, I exhibit to the meeting some interesting birds 
belonging to the fine series of specimens of the order Accipitres, which that gentleman 
has collected for the Norwich Museum. Among them appear to be several new or 
little-known species, concerning which I beg to offer the following remarks. 
1. Urusirinea scurstacea. (PI. LVIII.) 
Asturina schistacea, Sund. Ofv. af K. Vet. Ak. Forh. 1849, p. 132. 
Falco ardesiacus, Licht. in Mus. Berol. 
Morphnus schistaceus, Sclater, P. Z. 8. 1857, p. 261. 
$ adultus. Totus nigro-cinerascens, cauda mgra, fascia media angusta margineque 
apicali albis: orbitis subnudis : rostri apice nigra, hujus basi cum pedibus flavis. 
Long. tota 16:0, ale 11-0, caudz 7:0, rostri a rictu 1°4, tarsi 3°3. 
Sundevall has given an excellent description of this bird, which does not appear to 
have been recognized by any other writer except Prince Bonaparte. By the latter 
author it is alluded to in an article entitled ‘‘ Revue générale de la classe des Oiseaux,” 
in the ‘ Revue et Mag. de Zool.’ for 1850, p. 474, and again in the ‘ Comptes Rendus * 
for 1855, under the specific name ardesiacus, the synonym ‘‘ Falco ardesiacus, Licht. in 
Mus. Berol.” being said to refer to it. 
Of the two examples of this species belonging to the Norwich Museum, one was 
procured by Mr. H. W. Bates’ on the Rio Javarri, a branch of the Upper Amazon ; 
and the other, I have no doubt, from the ticket with which it is labelled, is from the 
interior of Bolivia. So we may conclude that the interior wood-region of Peru and 
Bolivia is its natural habitat. 
There are at least three birds of this group which are in their adult plumage slaty- 
black or blackish, with a white bar across the tail. The first of these and largest in 
size is the Falco urubitinga of the older authors. Lesson in 1839 proposed to convert 
the term Urubitinga into a generic name, and it was so adopted by Lafresnaye in 1842, 
before the creation of Cabanis’ genus Hypomorphnus for the same type. See M. de 
Lafresnaye’s remarks on this subject in the ‘ Revue Zoologique’ for 1848, p. 240. 
With regard to the specific name to be employed for this bird, we cannot use Brisson’s 
“ brasiliensis,” as is done in Strickland’s ‘ Ornithological Synonyms,’ because Brisson’s* 
1 See Proc. Zool. Soc. 1857, p. 261. 
* See British Association’s Report on Zoological Nomenclature, rule 2, p. 5. 
