ECONOMIC RELATIONS OF OUR BIRDS. 
607 
268. Harelda glacialis (Linn.), Leach. LONG-TAILED DUCK; OLD 
WIFE. Group I. Class c. 
An abundant migrant and winter resident upon Lake Michigan. 
Food: One specimen obtained at Ithaca, New York, October 30th, had in its 
stomach only small mollusks. 
Small shellfish (Wilson). 
269. Histrionicus minutus (Linn.), Coues. HARLEQUIN DUCK. Group I. 
Class c. 
Of this species Mr. Nelson says: “Rather rare winter resident upon Lake 
Michigan. Dr. Hoy has secured specimens at Racine.” 
Food: Shrimps, shellfish, roe, aquatic insects and mollusca (Audubon). 
270. SoMATERiA MOLLissiMA (Linn.), Boie. EIDER DUCK. Group I. Class c. 
This species is included in Mr. Nelson’s list, and he there states that Dr. Hoy 
informs him that a specimen was obtained at Racine in January, 1875. 
271. SoMATERiA sPECTABiLis (Linn.), Boie. KING EIDER. Group I. Class c. 
Mr. Nelson says: “A single specimen has been taken at Milwaukee, and is 
preserved at that place (Hoy).” 
The three following species are reported by Mr. Nelson as winter residents in 
Illinois. From this it may be expected that they are at least migrants with us, 
unless in their movements they pass across the state without alighting, or go to 
the east of it: CEdemia Americana, Gro,; CEdemiafusca (Linn.), Flem.; CEdcmia 
perspicillata (Linn.), Flem. 
272. Erismatura rubida (Wils.), Bp. RUDDY DUCK. Group I. Class c. 
A common migrant. Mr. Nelson mentions the occurrence of this species in 
Northeastern Illinois during the breeding season. 
Food: Marine and fresh-water plants and seeds (De Kay). Shell-fish and 
mollusks (Samuels). 
273. Nomontx DOMINICA (Linn.), Ridg. ST. DOMINGO DUCK. Group I. 
Class c. 
Mr. Thure Kumlien has reported this species from Wisconsin (Coues). 
274. Mergus merganser, Linn. MERGANSER; GOOSANDER. Group I. 
Class c. 
A common migrant. 
Food: Fish, aquatic reptiles, shells, cray-fish, etc. (De Kay). 
275. Mergus serrator, Linn. RED-BREASTED MERGANSER. Group II. 
Class c. 
Not a very common migrant. 
Food: Small fry and shellfish (Wilson). 
