CHIROMACH.ERIS. 261 



520. Cliironiacliaeris manacus. 

 White-breasted Manakin. 



Pipra manacus Linn. Syst. Nat. i. p. 340, 1760 ( Cayenne) ; Cab. in Schomb. 

 Eeis. Guian. iii. p. 696, 1848; Salvin, Ibis, 1885, p. 301 (Bartica 

 Grove, Camacusa) ; Sclater, Cat. B. Brit. Mus. xiv. p. 313 (Bartica 

 Grove, Camacusa) ; Brabourne & Chubb, B. S. Aiiier. i. p. 310, 

 ho. 3171, 1912. 



Manacus manacus manacus Beebe, Oui' Search for a Wilderness, p. 392, 

 1910. 



Adult male. Forehead, lores, and crown of head blue-bhick like 

 the upper back, scapulars, wings, and tail ; outer primaries brown 

 with pale edges on the inner webs which become white on the 

 secondary-quills ; lower back, rump, and upper tail-coverts dark 

 lavender-grey; lesser marginal upper wing-coverts, ear-coverts, 

 hinder face, and hind-neck white, the feathers minutely marked 

 with dark brown or blackish ; throat and sides of neck, ujiper 

 breast, sides of body, axillaries, and inner under wing-coverts 

 white; lower breast, abdomen, lower flanks, and under tail- 

 coverts lead-grey ; the outer or marginal under wing-coverts 

 blackish ; under surface of flight-quills pnle brown on the apical 

 portion, white at the base ; lower aspect of tail dark brown. 



Total length 105 mm., exposed culmen 11, wing 50, tail 31, 

 tarsus 21. 



The description of the male is based on a specimen collected on 

 the Abary River in July 1906. 



Adult female. Entire upper surface grass-green ; inner webs 

 oE flight-quills brown with pale margins ; under surface of body 

 yellowish green ; throat more or less tinged with grey ; axillaries 

 and under wing-coverts pale grey, inclining to whitish on the 

 inner edges of the flight-quills. Wing 53 mm. 



The specimen described was collected on the Supenaam Itiver, 



The young male in its first phimage is like the female. The 

 first apj)earance of the male dress may bo seen on the throat and 

 sides of the face and the black on the crown of the head. 



Breeding-season. Unknown in British Guiana. 



Nest. According to Scliomburgk, the nest is similar to that of 

 Chiroxip/iia ]>areola (q. v.), p. 256. 



Kfi(js. Undescribed from British Guiana. 



Range in British (Juiana. Ituribisi Uiver, Supenaam Kiver, 

 Bartica, Kamakabra Uiver, Abary Hiver, Arwye Creek, (jlreuL 



