AVES. 9 



LONGIPENNES. 



STERCORARIIDAE. 



Stercorarius catarrhactes (Linne). Dresser, Birds of Europe, 

 1871-81, vol. 8, pi. [009]. Egg, Seebohm, 1890, p. US, pi. 37, 

 figs. 3, 4. 



Pelagic; nests on rocky cliffs or tundras. 



Mass. Rare visitor offshore: Georges Banks, July, 1878; 

 Nantucket Shoals, Oct. 11, 1883; Polluck Rip, Sept. 10, 1884. 



10. Stercorarius pomarinus (Temminck) Vieillot. 



Pomarine jaeger. 



Lestris pomarinus Temm., Man. d'ornith., 1815, p. 514. "les 

 regions du cercle Arctique. " Audubon, Birds of Amer., 1844, 

 vol. 7, p. 180, pi. 451. Egg, Seebohm, 1890, p. 110, pi. 37, fig. 0. 



Largely marine; nests on the ground. 



Me. Uncommon migrant, casual in summer. May; (June 23, 

 24); July 14-late Oct. 



Mass. Uncommon migrant, oecasional in summer. May 23; 

 July 5-Sept. 28. 



R. I. Uncommon migrant offshore, mainly in fall. Oct. 



17. Stercorarius parasiticus (Linne) Schaffer. 



Parasitic jaeger; Gull chaser; Marlinspike; Richardson's 

 jaeger; Robber gull; Sea hen. 



Larus parasiticus Linne, Syst. nat., ed. 10, .1758, vol. 1, p. 130. 

 "intra tropicum Cancri, Europae, Americae, Asiae." 



Lestris richardsonii Swains. Audubon, Birds of Amer., 1844, 

 vol. 7, p. 190, pi. 452. Egg, Seebohm, 1890, p. 110, pi. 37, figs. 1, 2. 



Largely marine; nests on the ground. 



Me. Uncommon migrant offshore; casual in summer. May- 

 June; (July) Aug.-Oct. 



