16 LIST OF CONTRIBUTORS. 



Cassin, John. Continued. 



■ Descriptions of new species of Hirundinidee and Psittacidse, 



specimens of which are in the collection of the Academy of 



Natural Sciences of Philadelphia. P '53, 369 



Synopsis of the species of Falconidae which inhabit America 



north of Mexico, with description of new species. P '53, 450 



Catalogue of the Hirundinidse in the collection of the Aca- 

 demy of Natural Sciences of Philadelphia. P '53, Suppl. 



Catalogue of the Halcyonidae in the collection of the Aca- 

 demy of Natural Sciences of Philadelphia. P '53, Suppl. 



On presence of crossbill in neighborhood of Philadelphia. 



P '54, 203 



■ A list of pigeons of the genus Carpophaga Selby, in the col- 

 lections of the Academy of Natural Sciences of Philadelphia and 

 of the U. S. Exploring Expedition (Vincennes and Peacock), 

 Washington; with descriptions and notices of new and little 

 known species. P '54, 227 



On a specimen of Crex pratensis. P '55, 265 



Notes on North American Falconidae with descriptions of 



new species. P '55, 277 



On Canis antarcticus. P '55, 289 



Descriptions of new species of birds from Western Africa in 



the collection of the Academy of Natural Sciences of Phila. 

 P '55, 324 



On DuChaillu's expedition to Western Africa. P '55, 410 



Notices of some new and little known birds in the collection 



of the U. S. Exploring Expedition in the Vincennes and Peacock, 

 and in the collection of the Academy of Natural Sciences. 

 P '55, 438 



Notes on North American Birds in the collection of the 



Academy of Natural Sciences and the National Museum, Wash- 

 ington. P '56, 39 



Description of new species of African birds in the museum 



of the Academy of Natural Sciences, collected by Mr. P. B. 

 DuChaillu in equatorial Africa. P '56, 156 



Descriptions and notes on birds in the collection of the 



Academy of Natural Sciences of Philadelphia and in the Na- 

 tional Museum Washington. P '56, 235 



— Catalogue of birds collected at Cape Lopez, Western Africa 

 by Mr. P. B. DuChaillu in 1856 with notes and descriptions of 

 new species. 1* '56, :>1l> 



