250 BIRDS OF BRITISH GUIANA. 



Key to the Species. 



A. Larger, wing more than 250 mm., top of 



head with dark narrow shaft-streaks ; upper 

 tail-coverts white ; tail white broadly banded 

 with black L. alhicollis, p. 2o0. 



B. Smaller, wing less than 250 mm. ; top of 



head broadly streaked with black ; up]:)er 

 tail-coverts black ; tail black, narrowly 

 banded and slightly tipped with white L. melanops, p. 251. 



158. Leucopternis albicoUis. 



AVhite-collarei) Hawk. 



Falco alhicollis Lath. Ind. Orn. i. p. 86, 1790 (Cayenne). 

 Astuinna -pcecilonota Cab. in Schomb. Reis. Guian. iii. p. 787, 1848. 

 Uruhitinga alhicollis Sharpe, Cat. B. Brit. Mus. i. p. 216, 1874. 

 Leucopternis alhicollis Salvin, Ibis, 1886, p. 74 (Camacusa) ; W. L. 



Sclater, Ibis, 1887, p. 819 (Seceeka, Ari-pia-caru, Pomeroon River j ; 



Quelch, Timehri (2) vi. p. 158, 1892 (habits) ; Brabom-ne & Chubb, 



B. S. Amer. i. p. 69, no. 686, 1912. 



Adult. Head, hack, and entire underparts white with dark 

 sliatt-lines on tlie head and a few (hirk blotches on the mantle ; 

 wings black, many of the feathers Ijarrcd and tipped with white ; 

 ])riniary and .secondary quills barred, chiefly on the inner webs, 

 and tip[)ed with wliite, and al.^o barred with grey ; tail-feathers 

 white, broadly banded with black. 



Total length 470 mm., culnien (including tlie cere) 34, wing 339, 

 tail 200, tarsus 75, middle toe and claw 61. 



The bird described was collected on the Ituribisi I^iver. 



We are unable, for the want of more material with proper data, 

 to say what the difference between the male and female is. 



Breeding-season. Unknown in British Guiana. 



Kest. Unrecorded in British Guiana. 



Eggs. Undescribed from British Guiana. 



Range in British (j/iiiana. Ituribisi River, Abary River, Mazaruni 

 River (^McConnell collection) ; Kamaknsa {Whitely) ; Seceeka, 

 Ari-pia-caru, Pomeroon (IP. L. Sclater) ; Ourunei ( Whiteh/). 



Extralimital Range. Northern Brazil, Venezuela, Trinidad. 



Habits. Schomburgk states (Reis. Guian. iii. p. 737) that he 

 only once met with this species, and that was in the virgin forest 

 on the coast. 



Mr. J. .1. Quelch (Timehri (2), vi. [). 158) remarks : — " A very 

 beautiful species, Leucopternis albicoUis, will be met with along the 

 rivers, es[)ecially in the more wooded and secluded districts. It 



