PLATE CCXXXVIL 



LARUS PARASITICUS, 



ARCTIC GULL. 



Anseres. 



GENERIC CHARACTER. 



Bill ftraight, (harp edged, a little hooked at the tip, and without 

 teeth; lower mandible gibbous below the point: noftrils linear, 

 broader on the fore part and placed in the middle of the bill. 



SPECIFIC CHARACTER 



AND 



SYNONYMS. 



Above black : collar, breaft, and abdomen, white : two middle tail 

 feathers very long. 



Larus parasiticus : fupra niger, coUo peclore et abdomine albis, 

 re6tncibus duabus intermediis longiffimis. Lath. 

 Ind. Orn. 8 19- lo. 



Laruus parasiticus: icaicibus duabus intermediis longiffimis. 



Linn. Faun. Suec. 156. — GmeL 60 i. 10. 



Sterna 



