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BULLETIN OF THE 



the middle and northern portions of the United States nearly to the south- 

 ern extremity of South America ; the C. aura also extending as much be- 

 yond the southern limit of the C. alratus in South America as it does to 

 the north of it in North America. 



The Cathartes Burrovianus of Cassin, described in 1843, from a single spe- 

 cimen from Mexico, is referred by Bonaparte, in his Conspectus, to C. jota, 

 or to what I regard as the typical form of C. aura, and evidently with good 

 reason. It differs from C. aura only in being smaller. I am therefore 

 disposed to regard it as based on an unusually small specimen of that spe- 

 cies. Though Dr. Gambel supposed he had seen it with the other species 

 in Lower California, but two specimens seem to have been known to Mr. 

 Cassin, one of which was from an unknown locality. 



Measurements of Florida Specimens of Cartiiartes aura. 



80.* Cathartes atratUS Swainson. Black Vulture. 



? Vultur brasiliensis aut mexicanus Ray, Synop. Meth. Avium, 10, 1713. 



Vultur atratus Bartram, Travels, 289, 17'Jl. 



Cathartes atratus Swainson, Faun. Bor. Am., II, 6, 1831. — Audubon, Synop- 

 sis, 3, 1839. — Bonaparte, Consp. Gen. Av., I, 9, 1850. — Cassin, Illust. 

 Birds Cal., Texas, etc., 58, 1854. — Cassin, Gilliss's U. S. Nav. Astr. Exp., 

 II, 173, 1855. 



Vultur jota Wilson, Am. Orn.,IX, 104, pi. lxxv, fig. 2, 1814. (Not of Molina; 

 not of Gmclin.) 



Cathartes jota Bonaparte, Ann. N. Y. Lye. Nat. Hist., II. — Audubon, Orn. 

 Bio?., II, 33, 1835.— Bonaparte, Gcog. and Comp. List, I, 1838. 



Vultur urubu Vikillot, Ois. Am. Sept., I, 53, pi. ii, 1807. 



CdHiartes urubu Lesson, Voy. autourdu Monde, 014. — D'Orbigny, Voy. dans 

 1'Amer. Merit!., 1844. 



Cathartes <ntra Spix, Av. Spec. Novae, 2, 1824. 



Cathartes brasiliensis Bonap., Consp. Gen. Av., I, 9, 1850. 



Abundant. On the whole, probably about as numerous as the pre- 

 ceding, but the two species occur in different proportions at different 

 localities, and at different times at the same locality. None were seen 

 about Jacksonville during the two weeks I spent there in January, and 

 none were met with for some distance up the river. Above Lake 



