324 Mr. P. R. Lowe on Birds collected 



to leave unexplored. The only other land-bird seen was a 

 Peregrine Falcon. The whole island swarms with Iguanas. 



SuLA CYANOPS (Sundeval). 



One adult male taken. 



These birds were nesting, but were not present in anything 

 like the numbers of 8ula sida or Sula piscator. I have seen 

 them in far greater abundance on Arenas and Areas Cays in 

 the Gulf of Mexico, where they seem to be more at home. 

 On Orquilla they chose comparatively exposed and open 

 spaces on the rocks. In no instance did they breed in trees 

 or bushes. The nest, if such it may be called, is situated 

 on the bare rock, and is not lined M'ith either sticks or grass. 

 In some cases I noticed a sort of ring of very finely divided 

 pieces of rock formed round the shallow depression which 

 does duty for the nest. 



These birds seem to breed rather later than either of the 

 two other Gannets present on the Los Hermanos rocks. 



The colours of the soft parts, from notes taken on the spot, 

 are as follows : — 



Tarsi greenish drab. 



Webs and feet dirty yellowish drab. 



Gular sac of an Indian-ink colour. 



Bill greenish yellow. 



Iris yellow. 



These colours do not agree with those given by Mr. Cory 

 in his ' Birds of the West Indies.' 



Sula sula (Linn.). 



One adult male taken. 



Present in very great numbers, and nesting. The nests 

 were invariably situated on the bare rocks, and lined with a 

 few pieces of grass or twigs. 



The colour of the soft parts of this Gannet were taken on 

 the spot, and are as follows : — 



Tarsi and upper surface of webs bright chrome-yellow. 



Under surface of webs greenish yellow. 



Gular sac bright chrome-yellow. 



Bill yellow at base, shading off into bluish grey. 



