484 



PROCEEDINGS OF THE ACADEMY OF 



but the latter conjecture is rather favored by the circumstance 

 that of four specimens from Tehauntcpec (an intermediate localit}' 

 by the way), three obtained in August, and just freshly moulted, 

 are ochraceous beneath, while one shot in February, with older 

 plumage, is white. 



Notwithstanding that this species has been so generally iden- 

 tified with the Sparvius semitorquatus of Vieillot (Nouv. Diet. 

 Hist. Nat., x. 1817, 327, et Enc. Meth., 1263), we cannot concur 

 in this opinion, the very first clause in the diagnosis of that bird 

 precluding the possibility of it being this species. The diagnosis 

 is as follows : 



" VEpevier a demi-collier roux. 6. S. Semi-torquatus. S. 

 vertice albo, nigricante transversim striato; semi-torque rufes- 

 cente, fusco terminato ; corpore supra nigricante, rufescente 

 striate; ventre albo ; rostro fusco; pedibus flavescentibus." 



It being well known that the present species always, in every 

 stage of plumage, has the crown uniform black, we do not see 

 how the description of a bird with the "crown white, transversely 

 barred witli black," can possibby be made to apply to it. 



List of Specimens in U. S. National Museum. 



Locality. 



Panama E.R 



Colima, Mex 



Sierra Madre, Mex. 



When col- 

 lected. 



February . . 

 April, 1SH3 . 



Costa Rica (San Jose) 



Mir ad or, Mex 



Mazatlan, Mex 



Costa Kica (Angostura) 



" (Raucho Rodondo) 



Mazatlan, Mex. 



Tehuantepec, Mex.. 

 it i< 



Costa Kica 



1 1 



" Lipurio 



October 



Nov.' 16',is67 

 March, 1868 



Tehuantepec, Mex 



Costa 1'iica (Talamanea). 



November ., 



Feb. 19. 1872 

 1874 



From whom re- 

 ceived. 



McLeannan. . 



Xautus 



1 1 



1 1 



Carmiol 



Sartorius .... 



J. Grayson . . 



Carmiol 



von Frantzius 

 it 1 1 



J. Grayson . . 



F. Sumichrast.. 

 it ii 



W. M. Gabb... 



Sumichrast 

 M. Gabb... 



Nature of 

 specimen. 



S. (Skin.) 



S. 



s. 



S. 



S. 



s. 

 s. 

 s. 

 s. 



M. (Mounted ) 



S. 



M. 



S. 



S. 



s. 



s. 

 s. 

 s. 

 s. 



S. 



s. 



Other specimens examined. Mus. Acad. N. S. Philad.,7 ; Boston Soc, 2 ; G. N. Lawrence, 3 ; 

 Sumichrast collection, 0. Total, 38. 



