URINATORID.E — THE LOONS. 253 



with upper part of head and hind part of neck grayish; throat and fore-neck black, 

 without white streaks, but several longitudinal series of the latter down the side 

 of the nock, between the bla<:k and the gray. 

 3. TJ. arcticua. Fore-nerk and under side of nock glossed with velvety purple; occi- 

 put and hind-neck deep gray, almost plumbeous. Length 26.00-'_'<>.i)O; wing 12.15- 

 Kt. 20 (12.55); culmen 2.50-2.&5 (2.e0); depth of bill at base. .75-.80 (.7H). 

 [•*. TJ. pacificus {ravific l.oon). Fore-neck and under side of head glossed with dull 

 bronzy greenish, sometimes inclining to purplish; occiput and hind-ne;k very 

 pale smoky grayish, sometimes nearly white. Wing, 11.20-12.25 (11.5-t); culmen. 

 2.00-2.:J5 (2.15); depth of bill at base .55-.C5 (.62). Hah. PaciHc coa.st of North 

 America, from Alaska to Lower California, breeding far northward.] 

 B. Tai-sus longer than midd e toe u-itli claw. 



5. U. lumme. Fore-neck rich chestnut in summer; head and neck p!umbeous-gray, 

 the top of head and hind-neck streaked with white; upper parts speckled with 

 white. Summer plumage: Throat and fore-neck plumbeous, like rest of head 

 and neck, but marked down the middle with a wedge-shaped patch or stripe of 

 rich chestnut. W inter plumage and young: Throat and fore-neck white. 

 Downy young: Above uniform dusky, or sooty slate; lower parts paler and 

 more grayish. Length 24.00-27.00; wing, 10.00-11.50; culmen. 2.25; tarsus, 2.75. 



Urinator imber (Gunn.) 



THE LOON. 

 Popular synonyms. Great Northern Diver; Walloon; Guinea Duck. 

 Columbus imber Gttnn. Trond. Selsk. Skr. i, 1761, pi. iii. 



Urinator imber Stejn. Orn. Kamtsch. 1885, 313.— A. O. U. Check List, 1886, No. 7.— 



RiDGW. Man. N. Am. B. 1887, 7. 

 Colymbus immer Bkunn. Orn Bor. 1764, 34 (young).— LiNN. 8. N. ed. 12, 1, 1766, 22J. 



Urinator iminer Stejn. Proc. U. S. Nat. Mus. Vol. 6, 1882,43.— B. B. & R. Water B. N. A.m. 



il, 1884, 446. 

 Colymbus torquatus Beijnn. Orn. Bor. 1764, 41.— Lawb. in Baird's B. N. Am. 1858,888.— 



Baibd, B. N. Am. 18.59, No. 698.— Coues, Proc Acad. Nat. Sci. Phila. 1862, 227; Key, 1872, 



334; Check List. 1873, No. 6'.i5; 2d ed. 1882, No. 810.— Rldqw. Norn. N. Am. B. 1881, 



No. 736. 

 Colymbus glacinlis Linn. S. N. ed. 12,1. 1766,221.— Wils. Am. Orn. ix, 1824, 84, pi. 74.— Rich. & 



Sw. F. B.-A. ii, 1831, 474.— Nutt. Jtan. ii, 1834. 513.— Add. Orn. Biog. iv, 1838. 43, pi. 306; 



B. Am. vli, 1844, 282, pi. 476. 

 Colymbus maximus Gunn. Trond. Selsk. Skr. iii, 176.5, 125. 

 Mergus ncevius Bonnat. Enc. Meth. Orn. i, 1790, 73, 



Colymbus atrognlaHs Meyeb & Wolfe, Tasch. Vog. Deutschl. ii, 1810, 449 (part). 

 Colymbus hyemalis Beehm, Lehrb. Eur. Vog. ii. 1824, 883. 



Hab. Northern part of northern hemisphere. In America, breeding from Minnesota, 

 northern lllinoin, northern New York, New Hampshire, Maine, and mountains of California 

 northward; wintering south to the Gulf of Mexico; no extralimital American record. 



Sp. Chab. Adult. Head and neck dull black, with a greenish reflection, this brightest 

 on the lower part of the neck; fore-neck crossed by a narrow bar of white longitudinal ob- 

 long dots or short streaks; sides of the neck some distance below this crossed by a broad 

 bar of longitudinal white strejiks: upper parts black, beautifully vari'^gated with white dots, 

 these largest, quadrate in form, and arranged in transverse series on the scapulars, minute 

 and dot- like on the rump. Lower parts immaculate white, the sides of the chest narrowly 

 streaked with black, the sides and flanks black, dotted with white. Bill black, paler at th« 

 tip; iris carmine; legs an t feet "livid grayish blue, their Inner sides tinged with pale yel- 



