FAM. LXII. AUKS, PUFFINS, ETC. 339 



tic, on coasts and islands ; breeding from the Bay of Fuiidy northward, 

 also south to Long Island, and rarely farther south. 



3. Black Guillemot (27. Cepphus grylle). — In winter, a mot- 

 tled, grayish-black-backed, white-bellied "sea pigeon," with 

 sooty-black wings marked with a white blotch, formed by the 

 terminal half of the greater wing coverts. The back has the 

 feathers more or less tipped with white. In summer, it is 

 a sooty-black bird, with the same white patch on the wings. 

 These birds fly rapidly in a straight line just above the sur- 

 face of the waves, but are usually found, in small 

 flocks, swimming or diving in the water. 



Length, 13; wing, 6| (6-7) ; tail, 2; tarsus, 1^; 

 culmen, \\. Northern Atlantic Ocean on both 

 shores; in America breeding from Maine to 

 Newfoundland, and wintering south to I'hila- 

 dc'lphia. 



4. Mandt's Guillemot (28. 



Cepphus mdndtii). — Sim- 

 ilar to the last in habits, 

 size, and markings, but 

 the white blotch on the 

 wing is larger, including 

 the bases as Avell as the 

 tips of the greater wing 

 coverts. Mandt's Guillemot 



Length, 13 ; wing, 6| (5i-7J) ; tail, 2 ; tarsus, 1^ ; culmen, \\. Arctic 

 regions ; in America breeding from Labrador nortliward, and wintering 

 south to Massachusetts. 



5. Murre (30. Uria trdile). — An auk-like bird, with the upper 

 parts from bill to tail a sooty-black and the lower parts white, 

 excepting a brownish band across the lower neck in summer, 

 which in winter is lacking. The head is more brownish and 

 the back, wings, and tail are more blackish. There are white 

 tips to the secondaiy quills, making a band across the wing. 

 In winter the throat is some^vhat tinted with brown and the 

 belly marked with black. (Common Guillemot.) 



