184 LARIDjE. 



Two or three occurrences of this rare visitor in England 

 are on record. It inhabits the intertropical seas and coasts 

 from the West Indies to Australia. As a straggler it 

 visits the coasts of the United States as far north as New 

 England. 



Sterna anaestheta. SCOPOLI'S SOOTY TERN. 



Sterna Anaethetus (sic), Scopoti, Del. Faun, et Flor. 

 Ins. ii. p. 92 (1786). 



AncBstheta = dvaioBriros, without understanding (alaOtims), senseless. 



One was obtained off a lightship at the mouth of the 

 Thames (H. Saunders, P. Z. S. 1877, p. 43). It inhabits the 

 intertropical seas. 



Genus HYDROCHELIDON, Boie, Isis, 1822, p. 563. 



Hydrochdidon, from vdwp = water, and ^eXi^wv = a Swallow. 



Hydrochelidon hybrida. WHISKERED TERN. 



Sterna hybrida, Pallas, Zoogr. Rosso-As. ii. p. 338 



(1811). 



Sterna leucopareia, Naum. x. p. 168; Hewitson, p. 483; 



Yarr. ed. 2, iii. if. 512; id. ed. 3, iii. p. 517. 

 Hydrochelidon leucopareia, Macg. v. p. 663 ; Gould, v. p. 77. 

 Hydrochelidon hybrida, Gray, p. 242; Dresser, viii. p. 315. 

 Sterna hybrida, Harting, p. 168. 

 The Whiskered Tern, Yarr. ed. 1, iii. p. 404. 



Hybrida = a mongrel, hybrid, because Pallas thought it like a hybrid be- 

 tween H. nigra and Sterna fluviatilis. 



A rare straggler in the warm season to the southern and 

 eastern shores of England and Ireland. It inhabits the 

 southern Palsearctic Region and ^the Oriental and Ethiopian, 

 and Australia, 



