344 Mr. J. Gould on new species of Birds from South America 



the form of bars on the flanks ; under tail-coverts buff, barred with 

 dark brown ; irides red ; bill light horn-colour ; feet olive-brown. 



Total length, 8^ inches ; bill, 1 ; wing, 3^ ; tail, 3 J ; tarsi, 1 . 



Hab. Ucayli in Peru. 



Remark. — This species is very closely allied to C. scolopaceus, 

 Spix, but differs in being of a rather larger size, in having a some- 

 what more curved bill, a more uniformly coloured back, and in the 

 greater number and larger size of the brown markings of the under 

 surface, which, moreover, extend on to the upper part of the neck 

 and throat. 



Cham^za nobilis, Gould. 



Head very dark brown suffused with rufous ; upper surface, wings 

 and tail-coverts rich reddish or saffron-brown ; tail reddish-brown, 

 crossed by a broad black band near the end, and tipped with slightly 

 bufiy-white on the centre feathers, and much more conspicuously 

 on the lateral ones ; lores fawn-colour; under surface white, the 

 feathers of the breast broadly, and those of the centre of the abdo- 

 men narrowly bordered on the sides with brownish-black ; on the 

 flanks the latter hue increases to such an extent as to leave only a 

 lanceolate stripe of the white dovni the centre of each feather ; under 

 tail-coverts buff, speckled with brown ; above each eye a narrow 

 streak of buff commencing a little in advance of the centre of the 

 eye, and extending downwards as low as the nape ; irides brown ; 

 bill black ; feet reddish-brown. 



Total length, 9^ inches; bill, 1^ ; wing, 4^ ; tail, 2^ ; tarsi. If. 



Hab. Chamicurros, on the eastern side of Peru. 



Remark. — This is the largest and perhaps the finest species of the 

 genus : its legs and feet are very powerful, its bill thick and strong, 

 its tail very short and roun,ded, its wings concave, and its plumage 

 offers that silkiness to the touch which is so characteristic of the 

 members of the genus Chamcezay of which it forms in every sense a 

 typical example. 



FORMICARIUS NIGRIFRONS, Gould. 



Band across the forehead black ; crown, occiput and nape deep 

 chestnut ; upper surface and wings rich brown ; central primaries 

 edged at the base with yellowish-brown ; base of the inner web of 

 the primaries and secondaries golden, showing conspicuously on the 

 under surface, but not perceptible on the upper ; the outer covert at 

 the shoulder with a streak of ochreous-yellow along the margin of 

 its outer web ; tail brown at the base, gradually deepening into black 

 at the tip ; throat, neck and breast sooty-black ; abdomen and 

 under tail-coverts fuhginous-brown, assuming an olive tint on the 

 flanks ; irides brown ; bill black ; feet dark brown. 



Total length, 7 inches ; bill, \ ; wing, 3| ; tail, 2\ ; tarsi, 1^. 



Hab. Chamicurros, on the eastern side of Peru. 



Remark. — About the same size and nearly allied to F. Cayennensisy 

 but may be at once distinguished from that species by the bar of 

 black on the forehead. 



