BIOLOGICAL PAPERS. 165 



II. — Family Urinatorid.e. Loons. 



5. Urinator imber Gunn. Loon. Migratory; rare. 



III. — Family Larid.t:. Gulls and Terns. 



6. Larus argentatus smithsonianus Coues. Migratory ; rare. 



7. Larus californicus Lawr. California Gull. Accidental. 



8. Larus delawarensis Ord. Ring-billed Gull. Migratory; frequent. 



9. Larus franklinii Sw. & Rich. Franklin's Gull. Migratory. 



10. Larus Philadelphia Ord. Bonaparte's Gull. Migratory ; rare. 



11. Xema sabinii Sab. Sabine's Gull. Accidental. 



12. Sterna forsteri Nutt. Forster's Tern. Migratory; common. 



13. Sterna hirundo Linn. Common Tern. Migratory; rare. 



14. Sterna antillarum Less. Least Tern. Summer resident; rare. 



15. Hydrochelidon nigra surinamensis Gmel. Black Tern. A rare summer 



resident; common in migration. 



IV. — Family Anhingid.e. Darters. 



16. Anhinga anhinga Linn. Anhinga; Snake-bird. Accidental. 



V. — Family Phalacrocoracid.e. Cormorants, 



17. Phalacrocorax dilophus Sw. & Rich. Double-crested Cormorant. Migra- 



tory; rather common. 



18. Phalacrocorax mexicanus Brandt. Mexican Cormorant. Accidental. 



VI. — Family Pelecanid.e. Pelicans. 



19. Pelecanus erythrorhynchus Gmel. American White Pelican. Migratory ; 



common. 



VII.— Family Fregatid.e. Man-o'-war Birds. 



20. Fregata aquila Linn. Man-o'war Bird. Accidental. 



VIII. — Family Anatid.e. Ducks, Geese, and Swans. 



21. Merganser americanus Cass. American Merganser. Winter sojourner; 



not uncommon. 



22. Lophodytes cucullatus Linn. Hooded Merganser. A rare resident ; a com- 



mon migrant. 



23. Anas boschas Linn. Mallard. A rare resident; abundant in migration. 



24. Anas obscura Gmel. Black Duck. Migratory ; very rare. 



25. Anas fulvigula maculosa Senn. Mottled Duck. Migratory; rare. 



26. Chaulelasmus streperus Linn. Gadwall. A rare summer resident; a com- 



mon migrant. 



27. Mareca americana Gmel. Baldpate, A rare summer resident; a common 



migrant. 



28. Nettion carolineneis Gmel. Green-winged Teal. An abundant migrant; 



an occasional winter sojourner. 



29. Querquedula discors Linn. Blue-winged Teal. An occasional summer resi- 



dent; abundant in migration. 



30. Querquedula cyanoptera Vieill. Cinnamon Teal. Migratory; rare. 



31. Spatula clypeata Linn. Shoveler. A rare summer resident; a common 



migrant. 



32. Dafila acuta Linn. Pintail. Migratory ; common. 



33. Aix sponsa Linn. Wood Duck. Summer resident ; not uncommon. 



