68 CATALOGUE OF VERTEBRATES, 



Erismatlira, Bonaparte. Stiff-Tailed Ducks, 

 rubida, Bon. Ruddy Duck. Migrant. 



Mergus, Linnaeus. Mergansers. 



merganser, L. Merganser. Goosander. Fish Duck. Migrant. 



Order X. LONGIPENNES. The Long-Winged Swimmers. 



Family 48. LARIDiE. The Gulls. 



.Larus, Linnaeus. Gulls. 



argentatus, Brunn. Herring Gull. Com. G. Not com. sum. visitor. 



Cliroecocephalus, Eyton. Rosy Gulls. 



Philadelphia, Lawr. Bonaparte's Gull. Rare summer visitor. 



Order XI. PYGOPODES. The Diving Birds. 



Family 49. COLYMBIDiE. The Loons. 



Coiymbus, Linnaeus. Loons. 



torquatus, Brunn. Great Northern Diver. Loon. Com. sum. res. 



Family 50. PODICIPlJL^E. The Grebes. 



PodilymbllS, Lesson. Dab-Chicks. 



podiceps, Lawr. Diedapper. Hell-Diver. Dipper Duck. Migrant. 



