40 Field Museum ov Natural History — Zoology, Vol. IX. 



f^^ 



Murres. 



Winter plumage: Upper parts, black, or blackish; 

 under parts, white; length, about 8 inches; wing, about 

 4.50; bill. .50. Alle alle. 



Dovekie, or Little Auk. 

 See No. 61. 



*GROUF 2. Wing, over 6.50 inches long. 



Summer plumage: Length, about 16; wing, about 8; head, back, 

 wings, and tail, dark sooty brown; under parts and tips of secondaries, 

 white. Winter plumage: Under parts, white, more or less marked 

 with sooty brown or blackish about the throat, belly, and flanks; 

 bill, usually over 1.60. Maritime species — not recorded from Illinois 

 or Wisconsin. Uria troile. 



Murre. 



Similar to Uria troile, but has the head darker than the throat; 

 size slightly larger; length, about 16.50; wing, about 8.20; bill, 

 usually under 1.60. No record for Illinois or Wisconsin, but has 

 been taken in Indiana, Michigan, etc. Uria lomvia. 



Briinnich's Murre. 



*For directions for measurement, see page 21. 



See page 281. 



