HYDROCHELIDON. 185 



Hydrochelidon leucoptera. White-winged 

 Black Teen. 



Sterna leucoptera^ Schins in Meisn. & Schinz's Vog. 



d. Schweiz, p. 264 (1815). 

 Sterna leucoptera^ Naum. x. p. 215; Yarr. ed. 2, iii. p. 527; 



id. ed. 3, iii. p. 532; Harting, p. 169. 

 Hydrochelidon leucoptera, Macg. v. p. 661 ; Gould, v. pi. 76; 



Dresser, viii. p. 321. 

 Hydrochelidon nigra, Gray, p. 243. 



Leucoptera = XeuKoTrrepos, white-winged ; from Xeuicos + wrepov. 



A rare straggler, generally in spring and summer and occa- 

 sionally in late autumn, to the southern and eastern coasts of 

 England; has been recorded twice in Ireland. It inhabits 

 the southern and central Palsearctic and the Ethiopian 

 Regions, and has occurred as a straggler in New Zealand and 

 the United States. 



Hydrochelidon nigra. Black Tern. 



Sterna nigra, Linnceus, S. N. i. p. 227 (1766). 



Sterna nigra, Naum. x. p. 189 ; Hewitson, p. 488. 

 Hydrochelidon nigra, Macg. v. p. 658; Gould, v. pi. 75; 



Dresser, viii. p. 327. 

 Hydrochelidon fissipes. Gray, p. 243. 

 Sterna fissipes, Yarr. ed. 2, iii. p. 523; id. ed. 3, iii. p. 528; 



Harting, p. 7Q. 

 The Black Tern, Yarr. ed. 1, iii. p. 413. 

 Nigra = black. 



A spring and autumn visitant, and formerly abundant in 

 the breeding-season, especially in the eastern counties of 

 England, from which it is now banished by drainage and 

 persecution. It inhabits the Palsearctic and Nearctic Re- 

 gions, descending far south in winter. 



