General Remarks on the Classification of the Passerines. 



45 



Lampornis Sw. 

 Campylopterus Sw. 

 Ornismyia Less. 

 Merops L. 

 Upupa L. 

 Promerops Briss. 

 Alcedo L. 

 Ceryle Boie 

 Syma Less. 

 Todirhamphus Less, 

 Ceyx Less. 

 Prionitis 111. 

 Buceros L. 

 Coracias L. 

 Eurystomus Vieill. 

 Opisthocomus Hofifm. 

 Cypselus 111. 

 Acanthylis Boie 

 Caprimulgus L. 

 Antrostomus Gould 

 Chordeiles Sw. 

 Nyctibius Vieill. 

 Podargus Cuv. 

 Steatornis Humb. 

 Colius Briss. 

 Musophaga Isert. 

 Corythaix 111. 

 Chizaeris Wagl. 



Old World. 



Merops 



Upupa 



Promerops 



Alcedo 



Ceryle 



Syma 



Ceyx 



Buceros 

 Coracias 

 Eurystomus 



Cypselus 



Caprimulgus 



Podargus 



Colius 

 Musophaga 

 Corythaix 

 Chizaeris 



New World. 



Lampornis 



Campylopterus 



Ornismyia 



Alcedo 

 Ceryle 



Prionitis 



Opisthocomus 



Cypselus 



Acanthylis 



Caprimulgus 



Antrostomus 



Chordeiles 



Nyctibius 



Steatornis 



Australia and 

 Polynesia. 



Merops 



Alcedo 



Syma 



Todirhamphus 



Ceyx 



Cypselus 

 Caprimulgus 



Podargus 



VI. General Eemlarks on the Classification of the Passerines. 



A superficial study of the birds examined with regard to the formation of their 

 larynges, shews that the external forms of genera or families are repeated to a certain 

 decnree with varying larynges. There occur analogous external forms among Passerines 

 with, and without, the vocal larynx. The forms analogous to the Swallows {Einndo) 

 with vocal larynx, among the birds without it are the Swifts {Cypselns); just in the same 

 way the Muscicapae of the Old World {Muscicapidae) are related to the Iluscicapae of 

 the New {Ti/ranntdae), Nectarinia to TrocJdlus, the Ravens to the Rollers {Coracias), 

 Sylvia to Setophaga, Bombycilla to Ampelis, the FringiUidae to Colitis. Indeed one may 



