216 Messrs. Sclater and Salvin on the 
263. Urubitinga anthracina (Nitzsch): Sclater, P. Z. S. 
1858, p. 129. 
Transmitted by Mr. Skinner. Two immature birds of this 
species were shot by Salvin at Punta Arenas, in the Gulf of 
Nicoya, on the Pacific coast of Costa Rica. The stomachs of both 
these birds contained fragments of small Crustacea. Mr. Leyland 
obtained examples of this bird in the vicinity of Omoa. 
t/Z 264. Urubitinga-? 
Several skins of a Urubitinga in an immature state of plumage 
have at different times been transmitted by Mr. Skinner. One 
of these, in the Norwich Museum, shows a few feathers indi¬ 
cating that the adult is of the usual dark colouring of this group. 
Until lately, Mr. Gurney referred it to the South American 
U. schistacea; but, on closer comparison, he now concludes that 
it differs specifically from that bird, and belongs to a species 
whose adult plumage is as yet unknown. 
265. Urubitinga UNicixcTA(Temm.): PI.Col.313. Craxirex 
unicinctus , Baird, Rep. p. 46. (N. A.) 
In the Norwich Museum. Transmitted by Mr. Skinner. 
266. Buteogallus nigricollis (Lath.): Strickl. Orn. Syn. 
p. 43. 
About the forest-swamps of the low district in the neighbour¬ 
hood of the village of Santana Mixtan, this species occurs. Here 
it is not uncommon, and may be seen sitting on a dead stump 
or branch of a tree, uttering occasionally its harsh monotonous 
cry. From the stomach of one shot in the above locality were 
taken the scales of some species of fish, which, with the strong 
smell of the claws, left no doubt as to the nature of its food. 
Subfam. Buteonin^e. 
267. Buteo insignatus, Cassin, B. of Cal. pp. 102 et 198, 
pi. 31. (N. A.) 
We have Mr. Gurney's authority for ascribing a single spe¬ 
cimen shot by Salvin at Ducnas to this curious species. It 
appears to be rare in that district as elsewhere, as no others 
were observed, and none of the collections forwarded by Mr. 
Skinner have contained examples. 
