15 



it is as a rule uncommon ; at the eastern end it occurs more fre- 

 quently but is irregular (Dutcher, Auk, II, 1885, p. 38). During 

 some seasons, however, they become common in our waters 

 (Averill, Auk, VIII, 1891, p. 307). Giraud's record of "Uria troile" 

 doubtless refers to this species. Specimens in the Lawrence 

 Collection orginally labeled "U. troile" are U. lomvia. 



10. Alca torda (Linn.}. RAZOR-BILLED AUK. (32.) Breeds, 

 from the Magdalen Islands northward ; in winter migrates south- 

 ward, regularly to Long Island, and rarely to Virginia and North 

 Carolina. 



11. Alle alle (Linn.}. DOVEKIE. (34.) A species of the far 

 north, migrating southward in winter, more or less regularly to 

 New Jersey. With us its numbers vary during different winters. 

 It is considered by Butcher to be generally a rare bird on Long 

 Island (Abst. Linn. Soc. No. 4, 1892, p. 6), but is given by Scott 

 as a regular winter visitant on the New Jersey coast (Bull. Nutt 

 Orn. Club, IV, 1879, P- 228). 



Order LONGIPENNES. Long-winged 

 Swimmers. 



Family STERCORARIID^. SKUAS AND JAEGERS. 



12. Stercorarius pomarinus (Temm.}. POMARINE JAEGER, 

 (36.) Passes the nesting season chiefly within the Arctic Circle,, 

 and migrates southward from July to late October during which 

 period it is sometimes not uncommon off our coast; its presence 

 depending largely on the abundance of the small fish on which it. 

 feeds (Baird, Auk, IV, 1887, p. 71). 



13. Stercorarius parasiticus (Linn}. PARASITIC JAEGER.. 

 (37.) Breeds in the Barren Grounds of Arctic America and in 

 southern Greenland ; migrates southward to the Great Lakes, and 

 along the Atlantic coast to South America ; winters from the: 

 Middle States southward. It occurs off the coast in this vicinity 

 as a regular migrant with the preceding species. 



14. Stercorarius longicaudus Vieill. LONG-TAILED JAEGER^ 

 (38. Breeds in about the same region as the preceding and 

 migrates southward to the Great Lakes and Gulf of Mexico. 

 During its migrations it is sometimes not uncommon off our coast. 



