MUSEUM OF COMPARATIVE ZOOLOGY. 337 



tors of this group to tins evident discrepancy of proportions in Mr. Cas- 

 sin's description. An error in Mr. Cassin's figure also demands attention, 

 which is doubtless due to an inadvertency of the artist. This consists in 

 the scales on the front of the tarsus being arranged as Mr. Cassin says 

 he never saw in any rapacious bird, namely, continued to the toes in 

 broad, unbroken transverse plates, nearly as in Audubon's figure of the //. 

 Washingtoni ! 



92.* Polyborus brasiliensis Audubon. Caracara Eagle. " King Buz- 

 zard." 



Milvus brasiliensis Pay, Synop. Method. Av. et Pise, 17, No. 6, 1713. 



Circus brasiliensis Brisson, Ornithologie, I, 116, No. 31, 1760. 



Falco brasiliensis Gmelin, Syst. Nat., I, 262, 1788. 



Falco tharus Molina, Sagg. sul. Storni Nat. del Chile, 17S2. 



Polyborus tharus Cassin, Illust. Birds of Cal. and Texas, 113, 1856. — Cassin, 



Baird's Birds N. Am., 45, 1858. 

 Polyborus vulgaris Vieillot, Nouv. Diet., V, 257, 1816. — Audubon, Orn. 



Biog., II, 350, pi. clxi (young). 

 Polyborus brasiliensis Audubon, Synop., 4, 1839. — Bonap., Consp. Gen. Av., 



13, 1850. 



" Frequent at Enterprise, associating with the vultures." — Boardman. 



The swallow-tailed hawk (Nauclerus furcatus) became more or less 

 common early in March. I also saw a specimen of the Mississippi kite 

 (Ictinia ?nississippiensis) at Hawkinsville, March loth. 



STRIGID^J. 



93. Bubo virginianus Sivainson. Great-horned Owl. 



Strix virginiana Gmelin, Syst. Nat., I, 287, 1788. — Wilson, Nuttall, Au- 

 dubon. 



Strix (Bubo) virginiana Swainson, Faun. Bor. Am., II, 82, 183i. 



Bubo virginianus Bonaparte, Geog. and Comp. List, 6, 1838. — Audubon, 

 Synop., 29, 1839 —Cassin, Illust. Birds Cal. and Texas, 177, 1854.— 

 Cassin, Baird's Birds of N. Am., 1858. 



Strix bubo, var. magellanicus Gmelin, Syst. Nat., I, 286, 1788 



Slrix pythaules Bartram, Travels, 289, 1791. 



Bubo ludovicianus Daudin, Traite' d'Orn., II, p. 210, 1800. 



Bubo pinicola Vieillot, Ois. Am. Sept., I, 51, 1807. 



Strix (Bubo) arctica Swainson, Faun. Bor. Am., II, 86, pi. xxx, 1831. 



Bubo sub-aixticus Hov, Proc. Phil. Acad. Nat. Sci., VI, 211, 1852. 



Not apparently numerous. Mr. Boardman states that he saw only a 

 =ingle specimen, which was killed at Enterprise. I did not observe it 

 VOL. it. 20 



