ADDENDA. 



MUSCICAPA LATHAMI, 



Was described in 1819 under the name of Saocicola rhodinogaster, by 

 M. Drapiez in the Annales Generates des Sciences Physiques par MM. 

 Bory de St. Vincent, &c. Brussels. 



In a late number of his Zoological Illustrations, Mr Swainson has pro- 

 posed the generic appellation of Petro'ica for a group including the Musci- 

 capa multicolor of authors, with M.Lathami and Goodenovii *, Vigors, placing 

 it among the Saxicolince (so that M. Drapiez was nearer the truth than 

 ourselves), and represented in North America by Sialia. Upon comparing 

 these birds with many of the Muscicapidce, we certainly prefer removing 

 them to the other group. Muscicapa Lathami should therefore now re- 

 main a synonym, and bear the appellation of Petro'ica rhodinogaster. 



PLATYRHYNCHUS COLLARIS et DESMARESTII. 



In our description of these two species, we expressed our doubts of their 

 joining well in with the genus Platyrhynchus, since that we have met 

 with several others, and think them sufficiently numerous to form a divi- 

 sion by themselves. We therefore now propose the appellation Platy- 

 steira, and add the generic characters. The chief differences were before 

 pointed out in the description of the species. 



The locality of the specimens described were at the time unknown. We 

 have since received, by the attention of Dr. Ferguson, P. Desmarestii 

 from the vicinity of the river Gambia. 



PLATYSTEIRA, nobis. 



Char. Gen. — Rostrum mediocre, rectum, carinatum, latius quam altum, frontis latitudinem 

 aequans, depressum, apice adunco, tomiis maxillae pone apicem utrinsecus emarginatis, 

 dilatatis ; nares medio rostri, membrana vibrissis plumulisque instructis postice tecti, 

 apertura terminali ovali ; rictus amplus, ad basin vibrissis rigidis obtectus. Alee me- 

 diocres, rotundatas, remiges, l m ° brevi, 2 do , 3 tio , 4< to , gradatim longioribus ; 5 t0 , longis- 

 simo. Cauda subaequalis. Pedes incessores, graciles, mediocres, digito externo, usque 

 ad secundum, interno, ad primum articulum coalitis. Acrotarsia scutulata, paratarsia 

 squamis minutis obtectis. 



Country, Africa. Types, Le Priprit of Vaillant's Oiseaux d'Afrique, and P. col- 

 laris and Desmarestii. 



* Mr Swainson informs us he has not seen this bird, but suspects it belongs to a different type. 



