CASPIAN TERN. 



271 



An example of Riippeirs Tern, frequently called the Swift Tern {Sterna 

 bergii), was reeorded by Thompson, under the name of Sterna velox {' Zoo- 

 logist/ 1847, p. 1878), as having been killed near Dublin in December 

 18 16. This example has since been ascertained to have been a foreign 

 skin in full breeding-plumage purchased from a dealer. It is a trojjical 

 species, ranging from the Red Sea and the Cape of Good Hope eastwards 

 throughout the Indian Ocean, the Malay archipelago, and the China seas, 

 down to AustraKa and the Fiji Islands. Its egg is figured on Plate 47. 



