256 



BIRDS OF ILLINOIS. 



cases determino the species, U. arclicus being decidedly smaller; the two comraring 

 about as follows: 



Wing. 



Culmen. 



Gonys. 



Tip of bill to Depth of bill Tar=.,= 

 nostril. at nostril. -tarsus. 



TJ. arctic UA, juv, 

 TJ imber, juv.. . 



12.09 

 *1.3.(H) 



2.5.3 

 3 20 



L18 

 1.43 



1.8.5 

 2.43 



3.10 

 75 3.85 



*0r more. 



The Black-throated Loon is essentially an Vrctic bird, but is 

 said to be a very rare winter visitant to Lake Michigan, thus 

 doubtless occasionally occurring within the limits of Illinois. I 

 am not, however, able to cite anj record of its actual occur- 

 rence, and Mr. Nelson mentions only specimens taken at Racine 

 and Milwaukee, Wisconsin. 



Its habits are essentially the same as those of the larger and 

 more common species {U. imher). 



Urinator lumme (Gunn.) 



EEDTHEOATED LOON. 



Popular synonym. Red-throated Diver, 



Colymhus lumme Gunnkb. Trond. Selsk. Skr. i, 1761, pi. ii, flg. 2.— BbIjnn. Orn. Bor. 1764, 



39 (adult). 

 Urinator lumme Stejn. Proc. U. S. Nat. Mus. Vol. 5, 1882, 43.— B. B. & R. Water B. N. 



A.m. ii, 1884, 457— A. O. U. Check List, 1886. No. 11.— Ridgw. Man. N. Am. B. 1887. 8. 

 ^lymhus septentrionalis Linn. S. N. ed. 10,i, 17G0, 220 (adult).— Sw. & Rich. F. B.-A. ii.lS31. 



476.— NuTT. Man. ii, 1834, 510.— Aud. Orn. Biog. iii, 1835, 20, pi. 202; Synop. 1839,354; 



B. Am, vii. 1844, 299. pi. 478.— Lawk, in Baird's B. N. Am. 185.S, 890.— Baled, Cat. 



N. Am. B. 1859, No. 701.-CouES,Key, 1872, a35; Cheek List. 1873, No. 607; ed. 2. 1882, 



No. 814; B. N. W. 1874, 724.— Ridgw. Nom. N. Am. B. 1881. No. 740. 

 Colymhus stellatus Bkunn. t. c. No. 130 (young). 

 Colymhus horealis Bkijnn. t. c. No. 131. 

 Colymhus striatiis Gmbl. S. N. i.pt. ii, 1788, 586 (young). 

 Colymhus rufogularis Meter, Tasch. Vog. Deutsch. ii, 453 (adult). 

 Colymhus microrhynchos Beehm, Naum. v, 1855, 300. 



Hab. Northern parts of the northern hemisphere, breeding -from Labrador and Mani- 

 toba northward. South, in winter, entirely across the United States. 



Sp. Char. Achilt, summer plumage: Head and neck soft velvety cinereous, the 

 crown streaked with dusky; nape dusky, streaked with white; a longitudinal, we Ige- 

 shaped patch of rioh che.stnut covering the fore-neck, the lower, truncated, edge adjoining 

 the white of the chest, the upper point reaching to the lower part of the throat. Upper 

 parts dusky slate, more or less speckled with white. Lower parts entirely pure white, 

 except along the sides, beneath the wings, and on the crissum, whore more or less mix"d 

 with slate-color. Bill deep black, the extreme point yellowish, and the culmen sometimes 

 bluish; iris carmine; "tarsi aud toes bluish white, each joint of the latter, and the whole of 



