242 Messrs, G. M. Mathews and Tom Iredale : 



Order LARIFORMES. 



Family LAEID^. 



[Genus IIYDROOHELIDON. 



Hydrochelidon Boie, Isis, 1822, p. 563. 



Type (by subsequent designation) : H. nigra (Linne). 



Hydrochelidon leucoptera grisea (Horsfield). Eastern Wliite- 

 vvinged Black Tern. 

 Sterna grisea Horsfield, Trans. Linn. Soc. Lond. vol. xiii. 

 1821, p. 199 : Java. 



Synonym : — 



Hydrochelido7i leucoptera Buller, Siippl. vol. i. p. 157. [The type- 

 locality of Sterna leucoptera Temmiuck, Manuel d'Ornitli. 

 1815, p. 48.3, is Shores of the Mediterranean.] 



Range: — New Zealand (accidental visitor, one occurrence: 

 Waihopai River, Dec. ]2tli, 1868, in fall hreedhig-plumage); 

 extralimital. 



Note : — Though no doubt has hitherto been cast upon 

 this record, we are agreed that it seems quite inadmissible 

 [cf. Mathews, Birds Austr. vol. ii. p. 3] 4, 1912).] 



Geiuis IIYDROPKOGXE. 

 Hydroprogne Kaup, Skizz. Entwick.-Gesch. Nat. Syst. 

 18,29, p. 91. 



Type (by subs, design.) : //. tschegrava (Lepechin). 



Hydroprogne tschegrava oliveri, subsp. n. New Zealand 

 Caspian Tern. 



Synonym : — 



Heroprogne (sic) cuspia Buller, Suppl. vol. i. p. 157. [The type- 

 locality of Sterna tscliegrava Lepechiu, Nov. Couim. Acad. 

 Petrop. vol. xiv. pt. 1, 1770, p. 500, is Shores of the Caspian Sea, 

 and -S'. caspia was described by Pallas from the same locality in 

 the same journal 82 pages subsequently. 1 



Range : — New Zealand (breeding). 



Note : — The New Zealand birds agree with H. t. strenua 

 Gould (Proc. Zool. Soc, 1846, p. 21), tlie Australian race, in 

 havhig longer bills tlian the typical form, but are smaller 



