442 Fleming, Birds of Toronto, Ontario. [£ u t k 



11. Pagophila alba. Ivory Gull. — One specimen taken by Mr. 

 Wm. Loan on December 25 (1887 ?), and still in his possession. This is an 

 immature bird heavily spotted with black. There is reason to believe that 

 this gull is probably a regular visitor in winter to Lake Ontario. 1 



12. Rissa tridactyla. Kittiwake. — Accidental migrant; several 

 were taken in November, 1899, 2 and one on October 31 of the same year; 

 of these, all I examined were immature. Specimens recorded in 1889 3 1 

 never saw and are possibly incorrect. 



13. Larus glaucus. Glaucous Gull. — Regular winter resident, 

 not common, from December 3 to March 25. Mr. Maughan has one taken 

 May 4, 1893, a male in the white phase of the immature. All that I have 

 examined are in the mottled or white plumages, none being adult. 



14. Larus leucopterus. Iceland Gull. — One record, an immature 

 female taken December 12, 1898, in the collection of Mr. J. H. Ames. 4 



15. Larus marinus. Great Black-backed Gull. — Regular win- 

 ter resident, not uncommon. November 24 to February 16; earliest record 

 September 18, 1896; latest May 26, 1897. All the birds I have examined 

 or seen alive were mature. 



16. Larus argentatus. Herring Gull. — Common resident, abun- 

 dant in spring and fall; does not breed here, but keeps up a regular com- 

 munication with the lakes north of here, except in winter. 



17. Larus delawarensis. Ring-billed Gull. — Regular migrant, 

 March 25 to April 25; and from September 25 to November 16, and pro- 

 bably later; earliest record August 20, 1890. Said to be a winter resident 

 on the lake. 



18. Larus atricilla. Laughing Gull. — Two records, one a mature 

 male taken May 23, 1890, in Mr. Loan's collection 5 ; the other a female 

 taken June 1, 1898, in my collection. This bird lacks the black hood. 



19. Larus Philadelphia. Bonaparte's Gull. — Common spring 

 and fall resident, April 19 to the middle of May, and from September 20 

 to November 6; earliest fall record August 4, 1890; latest, December 15, 

 1897. 



20. Sterna caspia. Caspian Tern. — Regular spring migrant, 

 April 29 to May 28. Sometimes occurs in flocks of some size (up to fifty). 

 I have no fall records though this tern may occur in October; there are no 

 immature birds in local collections. 



21. Sterna forsteri. Forster's Tern. — Possibly a regular migrant; 

 I have examined only two birds, one a male, May 22, 1894, the other 

 taken October 19, 1899. 



22. Sterna hirundo. Common Tern. — Common migrant, May 25 



1 Mclhvraith, Birds of Ontario, 1S94, 42. 



2 Auk, XVII, 1900, 177. 



3 Proceedings Canadian Institute, 1S90, 190. 



4 Auk, XVIII, 1901, 106. 



5 Proceedings Canadian Institute, 1890-91, 41. 



