ECONOMIC RELATIONS OF OUR BIRDS. 
609 
281. Larus Delawarensis, Ord. RING-BILLED GULL. Group II. 
Class c. 
A rather common migrant, and, with the last, was obtained at Wliitewater. 
282. Rissa tridactyla (Linn.), Bp. KITTIWAKE GULL. Group II. 
Class c. 
Of this species Mr. Nelson writes: “A rare winter visitant to Lake Michigan. 
Dr. Hoy writes that in the winter of 1870 a single specimen of this species kept 
about the harbor for several days, but was too shy to be shot.” 
283. ChroIcocephalus Franklini (Rich.), Bruch. FRANKLIN’S ROSY 
GULL. Group II. Class c. 
Dr. Hoy states that a specimen was obtained at Milwaukee and is preserved in 
a collection at that place (Nelson). Mr. E. S. Richmond writes me that he has 
obtained it at Whitewater. 
• 
284. ChroIcocephalus Philadelphia (Ord.), Lawr. BONAPARTE’S ROSY 
GULL. Group II. Class c. 
An abundant migrant. 
Larus leucopterus, L, marinus, L. argentatus and Chroicocephalus atricilla 
are other Gulls included by Mr. Nelson in his “ Birds of Northeasteim Illinois.” 
Both Dr. Hoy and Mr. Nelson allege they have seen specimens of Xema Sabinii, 
which they did not secure. 
285. Sterna maxima, Bodd. ROYAL TERN. Group II. Class c. 
A specimen was taken at Milwaukee many years since and preserved in a 
museum there (Hoy from Nelson). 
286. Sterna hirundo, Linn. COMMON TERN; SEA SWALLOW. 
Group II. Class c. 
A rather common migrant. 
287. Sterna Fosteri, Nutt. FOSTER’S TERN. Group II. Class c. 
This is a summer resident and not very rare. I am confident that I liave seen 
it five times, though I have never obtained a specimen. 
Sterna anglica and Sterna caspia are included in Mr. Nelson’s list. I believe 
that I saw the first species at Berlin. Sterna superciliaris is also included. 
288. Hydrochelidon lariformis (Linn.), Coues. BLACK TERN. Group I. 
Class c. 
This is a very abundant summer resident and is to be found about most of our 
sloughs and weedy lakes in large numbers. 
Food: Of six specimens examined, three had eaten six di;agon-fiy larvae; three, 
six water-scorpions; one, eight dipterous insects; and three, twelve other insects. 
Grasshoppers, crickets, beetles, spiders and other insects floating on the watei 
(Samuels). Follows the plow for earth-worms and larvae (E. W. Nelson.) 
Yol.I —39 
