"the biological review. 9 



flight of Uria lomvia this season, but found it would require 

 more time than I had at my disposal. 



I therefore postponed the search until a more convenient 

 season, when probably the Observatory records will show fuller 

 data, as there are several points in the Gulf of St. Lawrence 

 which are not heard from during the winter months. 



Hubert H. Brown. 



POLYBORUS CHERIWAY ON LAKE SUPERIOR. 



On July 17, 1892, a strong south-west gale struck the shore 

 of Lake Superior, and the islands in the vicinity of Thunder 

 Bay, district of Algoma ; it blew all day, and on the following 

 morning Mr. George Cosgrove, lighthouse keeper on Victoria 

 Island, about thirty miles south-west of Port Arthur, picked up 

 a bird which had struck the light during the storm. 



Knowing the bird to be a stranger, he sent it to Port Arthur 

 to have it mounted. 



About three weeks later, being in town, the bird was shown 

 to me ; I made measurements and wrote a description of it, 

 which I sent to Dr. Brodie. I was informed by him that it was 

 a Caracara, probably Polyborus cheriway, a resident of southern 

 Texas and Mexico, and probably was forced from its habitat 

 by the storm above referred to. 



I expected to be able to secure the bird, had not a sudden 

 cold snap frozen over the bay and prevented Mr. Cosgrove 

 from getting to Port Arthur before I had to leave. 



It measures as follows : — Length, 22 inches ; wing, 14!- ; tail, 

 &J- ; tarsus, 3J ; middle toe and claw, 3. It is a slender built 

 bird, but evidently a very strong flyer ; the legs are long and 

 slim, much like those of the Marsh Hawk (Circus hudsonicus), 

 and about the same size. A large patch extending from the 

 base of the bill, behind the eye and down to the throat, bare 

 and yellow in color, sparsely featherd on the throat ; the 

 nostrils turned upward, almost on top of the bill ; a black 

 occipital crest about four inches in length ; neck and lower part 

 of throat white, with a black spotted line around the lower part 

 of neck ; back and upper parts of wings dark brown, turning 



