EXPLANATION OF PLATES. 339 



3. Mew gull, 24544, Murray Islands, Fleet Bay, Scotland, May 6, 1885, R. 



Sevell. 



4. Heermann's gull, 32004, Ildefonso Island, Lower California, April 8, 1909, 



W. W. Brown, jr. 



5. Heermann's gull, 31965, Ildefonso Island, Lower California, April 8, 1909, 



W. W. Brown, jr. 



Plate 86. 



1. Laughing gull, 23332, Cobb Island, Virginia, July 16, 1884, H. M. Smith. 



2. Laughing gull, 23331, Cobb Island, Virginia, July 16, 1884, H. M. Smith. 



3. Laughing gull, 18139, Rapeza Marsh, Virginia, B. Bidgway. 



4. Franklin's gull, 14212, Red River Settlements, 1865, D. Gunn. 



5. Franklin's gull, 12735, Lake Manitoba, Manitoba, D. Gunn. 



6. Franklin's gull, 24431, Jackson. County, Minnesota, May 18, 1890, O. L. 



Bullis. 



Plate 87. 



1. Bonaparte's gull, 15745, Fort Anderson, Mackenzie, 1866, B. McFarlane. 



2. Bonaparte's gull, 15744, Fort Anderson, Mackenzie, 1866, R. McFarlane. 



3. Bonaparte's gull, 11484, Fort Anderson, Mackenzie, 1866, R. McFarlane. 



4. Little gull, 15572, North Ladoga, Russia, June 1, 1869, H. E. Dresser. 



5. Ross's gull, 31096, Kolyma Delta, Siberia, June 13, 1905, S. Buturlin. 



6. Sabine's gull, 21401, Saint Michael, Alaska, 1877, E. W. Nelson. 



7. Sabine's gull, 11529, Franklin Bay, Mackenzie, 1865, B. McFarlane. 



8. Sabine's gull, 21408, Saint Michael, Alaska, 1877, E. W. Nelson. 



Plate 88. 



1. Caspian tern, 22556, Corpus Christi, Texas, June 15, 1883, B. F, Goss. 



2. Caspian tern, 22560, Corpus Christi, Texas, May 6, 1883, B. F. Goss. 



3. Royal tern, 26303, San Antonio Bay, Texas, May 12, 1892, H. P. Attwater. 



4. Royal tern, 26303, San Antonio Bay, Texas, May 12, 1892, H. P. Attwater. 



5. Royal tern, 21589, Clearwater, Florida, S. T. Walker. 



Plate 89. 



1. Elegant tern, J. E. Thayer collection, Cerralvo Island, Lower California, April 



10, 1910, W. W. Brown, jr. 



2. Elegant tetn, J. E. Thayer collection, Cerralvo Island, Lower California, 



April 10, 1910, W. W. Brown, jr. , 



3. Elegant tern, J. E. Thayer collection, Cerralvo Island, Lower California, 



April 10, 1910, W. W. Brown, jr. 



4. Cabot's tern, 26317, San Antonio Bay, Texas, May 12, 1892, H. P. Attwater. 



5. Cabot's tern, 25359, Hog Island, Bahamas, May 16, 1892, D. P. Ingraham. 



6. Cabot's tern, 25359, Hog Island, Bahamas, May 16, 1892, D. P. Ingraham. 



7. Cabot's tern, 25359, Hog Island, Bahamas, May 16, 1892, D. P. Ingraham. 



Plate 90. 



1. Gull-billed tern, 21522, Cobb Island, Virginia, May 30, 1871, Bev. C. M. Jones. 



2. Gull-billed tern, 21539, Texas. Dr. J. C. Merrill. 



3. Forster's tern, 18124, Bapeza Marsh, Virginia, July, 1880, R. Ridgway. 



4. Forster's tern, 21543, Minneapolis, Minn., 1876, E. Dickinson. 



5. Common tern, A. C. Bent collection, Lake Winnepegosis, Manitoba, June 19, 



1913, A. C. Bent. 



6. Common tern, A. C. Bent collection, Chatham, Mass., June 29, 1916, A. C. 



Bent. 



