INSESSORES. 71 



Order IL— INSESSORES, Vigors. 



Passeres et Pic^e, Linne. — Sylvicol^e, Vieillot. — Oiseaux. 

 Passereux, Cuvier. 



Rostrum diversion ; pedes breves aut mediocres ; tibiae plerum que 

 plumigeras ; digiti subtus plani ; ungues graciles, mobiles, sub- 

 retractiles, curvati, acidi. 



The Insessorial, or perching birds, vary considerably in the form 

 of the beak ; they have short or moderate legs ; the tibice 

 usually clothed with feathers ; the toes flat beneath ; the clatvs 

 slender, moveable, somewhat retractile, curved, and acute. 



From the vast extent of this Order and the very 

 great diversity of forms contained therein, it becomes 

 necessary to descend to a more minute subdivision 

 previously to treating of the families of which it is 

 composed. I shall therefore continue to tread in Mr. 

 Vigors' s steps, and briefly exhibit the five types of 

 form which are apparent, and which nearly corre- 

 spond with the divisions proposed by Cuvier in his 

 Regne Animal : these intermediate groups have not 

 unaptly been termed tribes. 



Beak and legs of 7 f Dentirostres, Cuvier. 

 stout make . 3 I Conirostues, Cuvier, 



1 Scansores Auctorum. 

 Beak and lees of 1 j ^ in ■ 



> < Ienuirostres, Cuvier. 

 slender form . J I t? ^ • 



1 rissiROSTREs, Cuvier. 



Following the usual method, I proceed to no- 

 tice — 



TRIBE I.— FISSIROSTRES. 



Rostrum basi latum; rictus amplissimus ; pedes breves. 

 Beak broad at the base ; gape very wide ; legs short. 



