NYCTIBIUS. 355 



feathers on the sidles o£ the mantle, seapalars, innermost secondaries, 

 abdomen, and under tail-coverts ; the innermost secondaries, 

 lower flanks, and nnder tail-coverts paler and inclining to cinna- 

 mon; bastard-wing and primary-coverts black; primary and 

 secondary quills dark brown edged with rufous un the outer webs; 

 tail barred with black, some of the bars broken up into mottlings. 



Total length 240 mm., culmen o, wing 162, tail 128, tarsus 7. 



This species is not represented in the McConnell collection, and 

 the description of the bird is taken from a specimen in the British 

 Museum collected at Sarayacu, Ecuador, by C. Buckley — Salvin- 

 Godman collection. 



There are no sexed specimens available ; we cannot sav. there- 

 fore, what the sexual ditferences are. 



JJreedino-seasoii. Unknown in British Guiana. 



2^e.<f. Unrecorded in British Guiana. 



Eaas. Undescribed from British Guiana. 



Range in British Guiana. (!araiben-lovv, Cumaka [Scliomhurgk] 



E.vtralimital Hange. Colombia, Ecuador, Peru. 



Habits. Schomburgk states (Reis. Guian. iii. p. 711) that he 

 only met with this species once, and that was in the vicinitv of 

 Caraiben-low, Cumaka, in the depth of a thick and damp forest. 

 He did not know anything of its nidification. 



220. Nyctibius griseus. 



Giant Goatsucker. 



Caprimvlriux (jriseus Gmel. Syst. Xat. i. p. 1029, 17S9 (Cayenne). 

 Xyctihius jamaiceusis Sah-in, Ibis, ISSo, p. 138 ( Bartica Grove. 



Koraima, 8700 ft.); Hartert, Cat. B. Brit. Mus. xvi. p. 625, 1802. 

 Xyctibius griseus Brabourne & Chubb, B. S. Amer. i. p. 97, no. 922, 



1912. 



Adult female {grey phase). General colour above blackish brown 

 everywhere marked with grey or whitish in the form of molth'ngs 

 or mottled bars and streaks, also a rufous tinge on the upper wing- 

 coverts ; under surface chiefly grey with blackish shaft-strenks 

 and black tips to some of the feathers; uiuler wing-coverts Idacki-h 

 dotted with white. 



Total lengtli 3i>."> mm., cidmcn 1'). wing 243, tail 1(17, tarsus JO. 



The female described was collected on the IMazaruni Uiver. 



It may be remarked that there is a rufous phase to this species 



2 A 2 



