( '-i«>7 ) 

 153. Hydrochelidon leucoptera grisea. 



Sterna grisea Horsfield, Trans. Lhiit. Sur. [Luml.) vol. xiii. p. l'J9. 1S21 : Java. 



Australian White-winged Tern. 



Mathews, Handlist No. 118. 



Range : Java and Anstralian Seas. 



The range of tlie Terns is not to be looked upon as final. 



Iii4. Hydrochelidon leucopareia fluviatilis. 



IJijilrorhpliil,,! flin-hililix Gould, /'/-o,-. Zmd. Soc. (/...«./.) 1842. p. 14(1. (184:i) : Interior New South 

 Wale."!. 



Eastern Anstralian Whiskered Tern. 

 Mathews, Hfoii/l/.tf No. 119. 

 Range: East Australia (lireeding). 



1S4a. Hydrochelidon leucopareia rogersi snbsp. n. 



Western Anstralian \\'hiskered Tern. 

 Mathews, IlnmUist No. 119 (pars). 



Differs from //. I. //tifiatilis in being lighter on the abdomen, wlien in fnll 

 breeding plnmage. 



Type : Parry's Creek, North-West Anstralia, No. 285. 

 Range : North-West Anstralia. 



Genus THALASSEUS. 



Thalassens Boie, /«;.<, 1822. p. 503. 



Type (liy subs, desig.) : T. tschegrava (Lepechin). 



155. Thalasseus uiloticus macrotarsus. 



Sterna marrotarxii Gould, St/noi>s. Birds Auslr. pt. ii. pi. 37. 1837: Tasmania. 



Australian Gnll-billed Tern. 



Mathews, IffiiuHisf No. 120. 

 Range : Anstralia (breeding). 



156. Thalasseus tschegrava strenuus. 



Sylwhelklon sireimus Gould, Pruc. Zo.il. Sue. (Luml.) 184t;. p. 21. (1846): .Southern Coasts of 

 Australia. 



Anstralian Caspian Tern. 

 Mathews, Ila/tt/l/st No. 121. 

 Range : Anstralia (breeding). 



Genus STERIfA. 



Slerm Linn^, Syst. Nat. ed. x. p. 137. 1758. 



T)-pe (by tautonymy) : ^. hintndo Linne. 



