Mr. Swainson on several new groups in Ornithology. 353 



Type. C. coronatus. 



C. cristatus ; niger ; tectricibus^ cauda^ anoque Jlavis ; 

 rostro elongatoj albescente. 



In this form are united the characters of Cassicus and Xan- 

 thornus. To the first it is more particularly connected by the 

 construction of the nostrils, which appear as if perforated in the 

 solid substance of the bill, by the comparative shortness of the 

 feet, and by the thickness and curvature of the nails ; both of 

 which indicate the arborial habits of the bird ; the narrowed 

 front of the bill accords with the latter group, I suspect this 

 type will not stand alone ; yet, for the present, it may be looked 

 upon rather as a sub-genus. 



Family Picida. 



Sub-family Piciana, 



ASTHENURUS. 



Rostrum rectum^ compressum^ acutum. 



Cauda gradataj debilis, 



Ala et pedes ut in genere Pico. 



Bill straight, compressed, acute. Tail graduated, soft. Wingi 



and feet as in Pious, 

 Type. Picus minutus. Linn. 



The internal structure of this curious little bird, will decide 

 whether it forms a passage from Picus to the Bar bets ^ or is more 

 closely allied to the CerthiadcPy by means of Yunx, 



COLAPTES. 



Rostrum mediocre, validum, compressum, culmine leviter arcuato. 

 Ala, pedes, caudaque ut in genere Pico* 



Bill moderate, strong, compressed ; culmen slightly curTed* 

 Wings, tail, and/ee^ as in Picus, 



Type. Picus auratus, Wilson, 1. PI. 2. f. 1. 

 Vol. III. z 



