CALVIFRONS. 313 



550. Calvifrons calvus. 

 Capuchin-bted, 



Corvus calmis Gmel. Syst. Nat. i. p. 372, 1788 (Cayenne). 



Gymnocephalus calvus Cab. in Schomb. Eeis. G-uian. iii. p. 690, 1848 ; 

 Salvin, Ibis, 1885, p. 306 (Eoraima, 3500 ft., Camacusa, Bartica 

 Grove); Sclater, Cat. B. Brit. Mus. xiv. p. 401, 1888 (Bartica Grove, 

 Camacusa, Roraima) ; Quelch, Timehri (2) iv. p. 115, 1890 (Great 

 Tails Demerara River), p. 334 (Upper Berbice lliver). 



Calvifrons calvus Beebe, Our Search for a Wilderness, p. 332, 1910 

 (Aremu River) ; Brabourne & Chubb, B. S. Amer. i. p. 325, no. 3317, 

 1912. 



"Bare-headed Chatterer" (^Quelch); " Quow-birds " (Quelch) ; 

 " CiiK-hir As" {Quelch). 



Adult. Head naked (black in skin). Hind-neck, sides of neck, 

 back, scapulars, and upper wing-coverts umber-brown, rather paler 

 on the hind-neck ; bastard-wing, primary-coverts, and quills black, 

 the last fringed with white on their inner edges ; upper tail- 

 coverts and tail also black ; sides of face and throat umber-brown ; 

 breast, abdomeii, sides of the body, and under tail-coverts rufous- 

 chestnut ; axillaries, under wing-coverts, and basal portion of 

 quill-lining white ; remainder of the quills below pale brown ; 

 lower aspect of bail blackish. Iris blue j bill and feet dark slate- 

 colour. 



Total length 340 mm., exposed culmen 43, wing 205, tail 99, 

 tarsus 41. 



The specimen from which the description is taken was collected 

 on the Ituribisi River. 



Breeding-season. Unrecorded in British Guiana. 



Nest. It nests in tall trees {Schomburgk) . 



Eggs. Undescribed from British Guiana. 



Range in British Guiana. Ituribisi River, Supenaam River, 

 Kyuni River (^McConnell collection); Roraima, Kamakusa, Bartica 

 ( Whitely) ; Great Falls Demerara River, Upper Berbice River 

 (Quelch); Aremu River [Beebe). 



Extraliinital Range. Cayenne {Gmelin). 



Habits. Schomburgk states (Reis. Guian. iii. p. 690) that h« 

 found this peculiar bird up to an altitude of 1200 feet ; it never 

 leaves the woods in which it lives, and one may always observe 

 pairs resting on tall trees beside each other. Its far-sounding 

 note very mu^ch resembles the bellowing of a calf. The bare 



