1868.] DR. H. BURMEISTER ON ARGENTINE ORNITHOLOGY. 633 



3. Contributions to the Ornithology of the Argentine Re- 

 public and adjacent Lands. By Dr. Herm. Burmeister, 

 F.M.Z.S.— Part I. 



In the second volume of my ' Voyage through the States of La 

 Plata,' and in Cabanis's 'Journal of Ornithology' (vol. viii. p. 241), 

 I have given synopses of all the birds observed by myself during my 

 journey through this country. These synopses were founded prin- 

 cipally on observations made in the middle, northern, and western 

 parts of this country, as I had not been long enough in the east- 

 ern parts to speak of the ornithology of that side of the rej)ublic 

 with good success. Now, resident during the past five years in 

 Buenos Ayres, I have studied the ornithology of this district, and 

 have observed some new species, and others not sufficiently known. 

 These I beg leave to bring to the knowledge of the learned Society 

 which has honoured me by naming me one of its foreign members. 



1. Hypomorphnus tjrubitinga, nob., Syst. Ueb. ii. 43. 



This remarkable bird I had already seen near Mendoza, but not 

 sufficiently recognized, and therefore not included in my synopsis. 

 Now I know that it is found all over the whole country, and comes 

 also up to Buenos Ayres, where it is observed on the island in the 

 mouth of the river Parana, near Las Conchas, from time to time ; 

 but it is always of rare occurrence. 



2. Nisus MAGNiRosTRis, Gm. ; I. c. ii. 76. 



Common in the vicinity of Buenos Ayres, and even on the towers 

 of the churches in the city, where it is seen catching Pigeons. 



3. Nisus gracilis, Temm. ; I. c. p. 77. 



This handsome bird was brought me two years ago by a French 

 hunter, who had shot it in the vicinity of Buenos Ayres. 



4. Cymindis boliviensis, sp. nov. 



C. fusco-nigra, remigihus rectricihusque subtus albo-fasciatis ; 

 cera pedibusque croceis : long. 18". 



We have of this species one specimen in our museum, which was 

 killed near Santa Cruz de la Sierra, in the woody plains of the inte- 

 rior of Bolivia. As I can find no description of this bird in the 

 works fallen under my inspection, I describe it as a new species. 



In size and figure entirely like the common Brazilian species Cytn. 

 uncinata. The bill not stronger, and of the same form, but rather 

 longer; the upper mandible black, the under mandible whitish. 

 The sides of the face, from the beak to the eyes, naked, with some 

 black bristles in a row from the eye to the nostrils. Iris dark brown. 

 The whole plumage blackish brown, but the bases of the feathers of 

 the vertex, from the front to the occiput, white ; the nuchal feathers 



