A Reference List of the Birds of New Zealand. 247 



Genus GYGIS. 



Grjgis Wagler, Isis, 1832, p. 1223. 



Type (by monotypy) : G. alba (Sparrman). 



Gygis alba royana Mathews. White Tern. 



Gygis alba royana Mathews, Birds Austr. vol. ii. 1912, 

 p. 433 : Kermadec Islands. 



Synonym : — 



Gyijin (dhn Biiller, SuppL vol. i. p. 1 63. [The t^-pe-locality of Sterna 

 alba Sparrman, Mas. Carlson. 1786, fasc. i. no. 11, is Ascension 

 Island, Atlantic Ocean.] 



Range : — Kermadec Islands (breeding). 



Genus BIIUCHIGA^T:A. 



Bnicliigavia Bonaparte, Consp. Gen. Av. vol. ii. 1857, 

 p. 228. 



Type (by monotypy) : B. novcshollandice (Stephens). 



Bruchigavia melanorhyncha BuUer. Black-billed Gull. 



Bruchigavia melanorhynclia Buller, Ibis, 1869, p. 43 : South 

 Island. 



Synonym : — 



Ldviis hulleri Hutton, Cat. Birds New Zeal. 1871, p. 41 : South 

 Island ; ? Potts, Ibis, 1872, p. 38 : South Island ; BuUer, Suppl. 

 vol. i, p. 164. 



Range : — South Island (breeding). 



Note : — There appears to be much confusion in the early 

 literature concerning this very distinct species. Tiiis has 

 not been cleared up in the ' Supplement,^ as mention is made 

 of another bird with a brown bill (distinct from Larns 

 scopulinus) and red legs. Such problems cannot be eluci- 

 dated without further collection of specimens. 



Bruchigavia novaBhollandiaB scopulinus (Forster). New 

 Zealand Red-billed Gull. 



Larus scopulinus Forster, Descr. Anim. ed. Licht. 1844. 

 p. 106 : Dusky Sound, South Island. 



