URINATORHLE— 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 neck, between the black and the gray. 

 3. U. arcticus. Fore-neck and under side of neck glossed with velvety purple; occi- 

 put and hind-neck deep gray, almost plumbeous. Length 2G. 00-29. 00; wing 12.15- 

 13.20(12.55); culmen 2.50-2.8.5 (2.60); depth of bill at base, .75-.80 (.78). 

 [4. U. pacificus (Pacific Loon). Fore-neck and under side of head glossed with dull 

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

 pale smoky grayish, sometimes nearly white. Wing, 11.20-12.25 (11.54); culmen, 

 2.00-2.35 (2.15); depth of bill at base .5S-.65 (.62). Hah. Pacific coast of North 

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

 B. Tarsus longer than midd'e toe with 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 dowu the middle with a wedge-shaped patch or -tripe of 

 rich chestnut. Winter 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 Gunn. Trond. Selsk. Skr. i, 1761, pi. iii. 



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



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

 Colymbus immer Brunn. Orn Bor. 1764, 34 (young).— Linn. S. N. ed. 12, 1, 1766, 222. 



Urinator immer Ste.tn. Proc. U. S. Nat. Mus. Vol.5, 1882,43.— B. B. & R. Water B. N. A.m. 



ii, 1884, 446. 

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



Baird, B. N. Am. 1859, No. 698— Coues, Proc. Acad. Nat. Sci. Phila. 1862. 227 ; Key, 1872, 



334; Check List, 1873, No. 605; 2d ed. 1882, No. 840.— Ridgw. Norn. N. Am. B. 1881, 



No. 736. 

 Colymbus glaci \li* Linn. S. N. ed. 12, i. 1766,221.— Wils. Am. Orn. ix, 1S2I, 84, pi. 74— Rich. & 



Sw. F. B.-A. ii. 1831, 474— Nutt. Man. ii. 1834. 513.— Aod. Orn. Biog. iv, 1838, 43, pi. 3H6: 



B. Am. vii. 1841. 282. pi. 476. 

 Columbus maximus Gunn. Trond. Selsk. Skr. iii, I7i;r>, 125. 

 Meraus ncevius Bonnat. Enc. Meth. Orn. i. 1790, 7:;. 



Colymbus atrogularis Meyer & Wolfe, Tasch. Vog. Deutschl. ii, 1810. 449 (part). 

 Colymbus hyemalis Brehm, Lohrb. Eur. Yog. ii, 1821,883. 



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

 northern Illinois, northern New York. New Hampshire, Maine, and mountains of California 

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



Sp. Char. Adult. Head and neck dull black, with a greenish refleotion, this brightest 

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

 long dots or sh'>rt Btreaks; sides of the neck some distanoe below this crossed by a broad 

 bar of longitudinal white streaks; upper parts black, beautifully variegated with white dots, 

 these largest, quadrate In form, and arranged In transverse series on the Bcapulars. minute 

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

 iked with black, the Bides and flanks black, dotted with white. Bill black, paler at the 

 Up; iris carmine; legs and feet "livid grayish blue, their ini tinged with pale yel- 



