202 
Catalogue of the Birds of Illinois. 
Order GAVIiE. 
Family LARID^E. — Gulls and Terns. 
Genus Rissa, Leach. 
316. R. tridactyla (Linn.) Bp. Kittiwake Gull. Winter visitant to Lake 
Michigan. 
Genus Larus, Linnseus. 
317. L. glauci{s, Brtinn. Glaucous Gull. Winter visitant to Lake Michigan. 
318. L. leucopterus, Fabr. Winter sojourner on Lake Michigan. 
319. L. marinus , Linn. Great Black-backed. Gull. Winter visitant to 
Lake Michigan. 
320. L. argentatus , Brtinn. European Herring Gull. Rare (or accidental) 
winter visitant to Lake Michigan (see Nelson, p. 145). 
*320 a. L argentatus smithsonianus , Coues. American Herring Gull. 
Winter sojourner throughout the state. A few remain in summer, on or near 
the larger bodies of water, but probably do not breed in our limits. 
321. L. delawarensis , Ord. Ring- billed Gull. Mainly transient, but 
winter sojourner southward, and rare summer sojourner (but not breeding ?) 
northward. 
322. L. atricilla , Linn. Laughing Gull. Rare summer visitant southward. 
323. L.franJclini, Sw. & Rich. Franklin’s Gull. Transient. 
324. L. philadelphice (Ord.) Gray. Bonaparte's Gull. Chiefly transient, 
but sometimes wintering; while a few apparently remain iji summer in certain 
localities. 
Genus Xema, Leach. 
325. X. sabinei (J. Sabine) Leach. Fork-tailed Gull. Rare winter visitant 
to Lake Michigan. 
Genus Sterna, Linnaeus. 
326. S. anglica, Montag. Marsh Tern. Rare summer visitant. 
327. S. caspia, Pall. Caspian Tern. Winter visitant. 
328. S. regia , Gamb. Royal Tern. Summer visitant. 
*329. S.Jtuviatilis, Naum. Common Tern. Mostly transient; abundant 
in suitable places, especially northward, where a few breed. 
*330. S.forsteri, Nutt. Forster’s Tern. Summer sojourner. 
331. S. antillarum (Less.) Coues. Least Tern. Summer visitant. 
Genus Hydrociielidon, Boie. 
*332. II. lariformis surinamensis (Gmel.) Ridgw. Black Tern. Summer 
sojourner. The most numerous and generally diffused species of the family. 
Family STERCORARIII).zE. — The Skuas and Jaegers. 
Genus Stercorarius, Brisson. 
333. S. pomatorhinus (Temin.) Pomarine Jaeger. Winter visitant to Lake 
Michigan (Nelson, p. 145). 
334. S. parasiticus (Linn.) Saunders. Long-tailed, or Buffon’s Jaeger. 
Casual winter visitant. (See Bull. Nutt. Orn. Club, January, 1880, p. 31.) 
