224: BIRDS OF BRITISH GUIANA. 



inner webs of the primary and secondary quills ; tail dark brown 

 with two white bands which are more [)ronounced on the inner 

 webs of the feathers, the tips edged with white ; throat pale ash- 

 grey ; the remaining portions of the under surface narrowly barred 

 with white and slate-brown, tinged with butt' on the abdomen ; 

 axillaries uniform dark slate-colour ; under wing-coverts barred 

 like the abdomen but more narrowly. 



Total length 345 mm., culmen 17, wing 17G, tail IGO, tarsus G2, 

 middle toe and claw 41. 



The bird described was collected on the Ituribisi River. 



Breeding-season. Unknown in British Guiana. 



Nest. Unrecorded in British Guiana. 



Effgs. Undescribed from British Guiana. 



Range in British Guiana. Ituribisi River, Anarica River, Abary 

 River {McConnell collection). 



E.iiralimital Rangp. Colombia, Ecuador. 



Habits. Not recorded in British Guiana. 



Genus GERANOSPIZIAS Kaup. 



Geranosjiizias Kaup, Isis, 1847, p. 183. Type G. gracilis (Temm.). 



This genus has only two species, one of which is confined to 

 Central America and the other to South America. The chief 

 characteristics are the scaling on the hinder portion of the tarsus, 

 commissure of bill slightly festooned, and the feathers of the thighs 

 closely set without any overhanging tufts. 



112. Geranosplzias cserulescens. 

 Grey Crane-Hawk. 



Sparviiis ccprulescens Yieill. X. Diet. d'Hist. Nat. x. p. 318, 1817 



(Gruiana). 

 IscJinosceles qracilis (nee Temm.), Cab. in Schomb. Eeis. Gruian. iii. 



p. 737, 1848. 

 Geranospizins ccsrnlescens Sharpe, Cat. B. Brit. Mus. i. p. 81, 1874 ; 



Brabourne & Chubb, B. S. Amer. i. p. 64, no. 591, 1912. 

 Geranospizias qracilis (nee Temm.), Salvin, Ibis, 1886, p. 76; Quelch, 



Tiniehri (2) xi. p. 142, 1892. 



" Blue Sparrow-Hawk " (Quelch). 



Adult female. General colour above and below dark slate-colour ; 

 bastard-wing and primary-coverts black ; quills black, blotched 

 and mottled with white chiefl}- on the inner webs, secondary quills 



