-93- Christmas: Latham; MacFarlane--breeding in great numbers on Oct. 16, 1884. Palmyra: Streets--abundant and breeding in December, at extreme east end of island. Sterna vittata Gmelin. (Type locality: Christmas Island.) ?Christmas: Latham. Reported from this island, which is its alleged type locality, but Saunders and Wiglesworth think an error was made and that Christmas Harbor, Kerguelen Id., was the locality in fact. The species occurs at the last named place, and Cook's vessels stopped there. Not other- wise recorded from Polynesia. Sterna australis Gmelin. (Type locality: Christmas.) Christmas : Latham. Not known since Cook's time. Related to S. frontalis Gray, from the s. w. Pacific, but said to be smaller. Saunders makes it a doubt- ful synonym of S. virgata, and thinks this is another mistake for Christmas Harbor, Kerguelen Id. Anous stolidus pileatus (Scopoli). Christmas: Streets--breeding in January. Fanning: MacFarlane. Palmyra: Streets--breeding in December. Washington: MacFarlane. Megalopterus melanogenys (Gray). Fanning: Arundel.