ADDENDA. 



Genus TITYRA, Vieillot. 



Since writing our remarks upon this genus previous to the publication 

 of our Synopsis Specierum in No. I., we find that we were mistaken in at- 

 tributing the right of priority of nomenclature to M. Vieillot. During 

 our correspondence in the interval which has elapsed since the appearance 

 of that Number with our friend Mr Swainson, that gentleman has satis- 

 factorily proved to us, that the Baron Cuvier certainly has the merit of first 

 characterising the group ; and we trust that that great naturalist will now 

 forgive the mistake we, through inadvertence, and with the desire of giving 

 merit only where merit was due, had unconsciously committed. The title 

 Pachyrhynchus has also more recently been given by Spix and Martius to 

 these birds, including some with modified characters, and which we would 

 now retain under that title, separating them from the true Psari. This opi- 

 nion had long since occurred to us in the investigation of the species, and 

 we perceive that a similar way of thinking has influenced Mr Swainson, 

 which he has given in the description of P. cristatus. He has placed the 

 subfamily Psariance, in the family Todidce, containing the genera, Psaris of 

 Cuv. and Pachyrhynchus of Spix, modified to contain only the smaller 

 species, with clothed cheeks, and the tail graduated. In the first, the rictus 

 is smooth, the cheeks sometimes bare, wings lengthened, the tail short and 

 even ; the type Ps. cayanus, Cuvier. In the second, the rictus is more or 

 less bearded, the cheeks clothed with feathers, the wings more rounded, the 

 tail lengthened and graduated ; the type Ps. niger, Swain. The genera 

 and species will, according to these views, therefore stand thus. We have 

 only added the characters of those which were not included in our for- 

 mer Synopsis. 



Genus PSARIS, Cuv. 



1. P. cayanus, No. 1. of former Synopsis. 



2. P. erythrogenys, No. 2. of ditto. — In museo Dom. Swainson. 



3. P. semifasciatus *, Tityra personata of PI. 24. — In museo Dom. Taylor. 



4. P. Jaedinii. — P. capite, auriculis, remigibus caudaque nigris ; dorso griseo, subtus alba, 



genis plumatis, alis absque remige spuria parva intermedia. 



Psaris Jardinii, Swain. Zool. Illust. No. 8. 

 Long. 7| pollices. 

 Hab. In Brasilia. 

 In Museo Dom. Swainson, et Gulieljii Jardine, Baronetti. 



* Spix has the priority in this name ; it is figured in Novce Species Avium Brasiliensium, vol. ii. 

 tab. 44. f. 2. 



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