52 GEOLOGICAL SURVEY OF CANADA. 



67. Cabot Tern. 



Sterna sandvicensis acufiavida (Cabot) Ridgw. 1884. 



Accidental along the Great Lakes. 



In the spring of 1882 Dr. Garniei noticed three individuals of 

 this species coursing around a mill-pond not far from his residence 

 at Lucknow, Ont. He shot one and the writer saw it after it was 

 mounted. {Mcllwraith.) 



69. f orster Tern. 



Sterna forsteri Nutt. 1834. 

 Only a casual visitor on Lake Ontario in spring and fall. {Mc- 

 llwraith.) Possibly a regular migrant at Toronto, Ont. I have 

 examined only two specimens. (/. H. Fleming.) Summer lesident 

 about the large lakes of Manitoba; nesting among the reeds. 

 {E. T. Seton.) Rare on JMany island lake, Sask. {Bishop.) This 

 ,species may be said to be regularly found wherever the common 

 tern is numerous in Manitoba but west of that province the only 

 locality at which I authenticated its presence by collecting in 1906 

 was at Manito lake, Sask. {Geo. Atkinson.) In the summer of 

 1881 the writer found them abundant on lakes Manitoba, Water- 

 hen and Winnipegosis where they were breeding in numbers in 

 the bordering marshes. West of Manitoba their place is chiefly 

 taken by the common tern, as only one pair was seen by Spread- 

 borough at Indian Head in a residence of three months in 1892. 

 Richardson says they extend northerly to lat. 57". 



Breeding Notes. — On June i8th, 1894, I found an immense 

 colony of these birds breeding on an island in Shoal lake, Man- 

 itoba. The nest was made in a hollow in the sand, and contained 

 three eggs, resting on a few straws. {Dippie.) It is not common 

 at St. Clair fiats, Ont., but nests have been taken there by Mr. J. 

 A. Morden, but only a few nests of this species to many of the 

 next. {W. Saunders!) 



70. Common Tern. 



Sterna hirundo Linn. 1758. 

 This is truly the " common tern," as it breeds abundantly from 

 the coasts of Labrador southward to the Grand Manan, N.B., on 



