426 Bid letin of the British 



to British Guiana and Trinidad^ and thence south to Paraguay 

 and Southern Brazil. It also extends to Peru. 



6. Ardetta pusilla (V.). 



Hab. Closely allied to A. e.vilis of N. America. Confined 

 to Australia and New Zealand. 



7. Ardetta eurythma. 



Hab. From North-eastern Siberia and Amurland, ex- 

 tending through all the Japanese islands to China, apparently 

 breeding on the Yangtze, occurring in winter in Cochin 

 China and Borneo. 



8. Ardetta involucris. 



Hab. Chili to Paraguay, Southern Brazil, and Northern 

 Patagonia. Recorded from Peru, but erroneously, as the 

 species from that country is A. erythromelas. 



9. Ardetta cinnamomea. 



Hab. From Araoorland to China and Formosa, not occurring 

 in any of the Japanese islands, but throughout the Indian 

 Peninsula and Ceylon, the Malayan Peninsula and islands 

 to the Philippines and Celebes. 



Dr. Sharpe next drew attention to the distribution of 

 some species of the genus Nycticorax, especially to that of 

 the true Night-Herons. Between N. navius of North 

 America and the ordinary N. nycticorax of Europe he was 

 unable to find any specific difference, and therefore the range 

 of this species appeared to be bounded by about 50° N. lat. 

 in both hemispheres, and beyond that line it could only 

 be considered an accidental visitor. Wherever suitable 

 localities existed, the Night-Heron bred, so that it was 

 equally at home in South Africa as in Hungary, and to 

 the east it occurred as far north as the Japanese islands and 

 Pekin, and as far south as Java and Celebes. In the Neo- 

 tropical Region it was found in Guiana, Colombia, and 

 Ecuador, and was probably the species which had been re- 

 corded from the Ucayali river in Ujaper Amazonia. 



The distribution of the two other species of Night-Heron 

 in South America was cui'ious. i\^. cyanocephalus, Molina 



