MS Mr. Swainson on two new Genera of Birds. 



Male, Above greyish brown ; throat, breast, and middle of the 

 body black ; sides and eye-stripe snowy ; tail graduated, 

 black, tipt with white. 



Female, Ferruginous brown above ; sides of the body testaceous ^ 

 middle tail feathers brown. 



Description, 



Size of the Wood-Wren. Bill black. The general tint of the 

 upper plumage in the nnale is grey; but in the female it is ferru- 

 ^npus; more particularly on the lower part of the back; the 

 iQ^^gins of the quill feathers are the same, the ^mV/* themselves 

 being brown. The sides of the head, ears, and fore part of the 

 neck, and breast and bodi/y are covered by a large patch of black 

 which extends to the vent; and is margined on each side by a 

 white line, which passes over the eyes and ears, becomes wider 

 on the sides of the breast and body, leaving the Jlanks and belly 

 in the male pure white, but tinged with ferruginous in the female. 

 The ^ings are very short, the covers are all black, marked by 

 snow white spots ; spurious quills the same. Tail lengthened and 

 cuneated ; the middle pair being more than an inch longer thaa 

 the outer pair; those which intervene are progressively graduated ; 

 they are all black, with obtuse white tips, except the middle pair, 

 which are greyish towards their base. Tarsi moderate, slate 

 cploured. 



Total length, 4 i inches ; bill, /^ ; wings not quite 2 ; tail, 2 1 ; 

 tarsi, |. 



Obs. I met with both sexes of this species in the Catinga woods 

 of Humildez. A specimen of the male is in the Cabinet of Mr. 

 Vigors. 



3. FoRMicivoRA brevicauda. 

 Short tailed Ant- Wren. 



F, cinerea; Jugulo pectoreque nigris; scapulis maculisque tectrices 



ornantibus albis ; cauda brevissima. 

 Cinereous, middle of the throat and breast black, shoulders and 



spots on the wing covers white ; tail very short. 



