128 



in. lin. 



Length of the ears 3 



— of the tragus 2 



of the fore-arm 1 6* 



of the longest finger 2 4 



of the fourth finger 1 11, nearly. 



of the thumb 3| 



of the tibia 8| 



of the foot and claws 5 



Expanse of wings, about 12 6 



The plate which accompanies the present memoir illustrates some 

 of the peculiarities of the genus of which I have given a description. 



2. On some New or little-known Species of Accipitres, 



IN THE COLLECTION OF THE NORWICH MUSEUM. By 



Philip Lutley Sclater, M.A. 



At the request of Mr. J. H. Gumey, 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. Urubitinga schistacea. 



Asturina schistacea, Sund. Ofv. Af. K. Vet. Ak. Forh. 1849, 

 p. 132. 



Falco ardesiacus, Licht. in Mus. Berol. 



Morphnus schistaceus, Sclater, P. Z. S. 1857, p. 261. 



3 adultus. Totus nigro-cinerascens, cauda nigra, fascia media 

 angusta margineque apicali albis : orbitis subnudis : rostri 

 apice nigra, hujus basi cum pedibus jlavis. 



Long, tota 16'0, alse ll'O, caudae 7'0, rostri a rictu 1*4, tarsi 3*3. 



Sundeval has given an excellent description of this bird, which 

 does not appear to have been recognized by any other writers except 

 Prince Bonaparte. By this author it is alluded to in an article en- 

 titled "Revue generale 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, Licbt. 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 Ja- 

 varri — 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 the natural habitat of this species. 



* See P. Z. S. 1857, p. 261. 



