tJBINATOEIDjE— THE LOONS. 253 



with upper part of head and hind part of neck grayish; throat andfore-neck blaok, 

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

 of the neck, between the black and the gray. 

 3. 11. arotioas. Fore-neck and under side of neck glossed with velvety purple ; oeci- . 

 put and hind-neok deep gray, almost plumbeous. Length 26.00-29.00; wing 12.15- 

 13.20 (12.55); oulmen 2.50-2.85 (2.60); depth of bill at base, .75-.80 (.78). 

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

 bronzy greenish, sometimes inclining to puipUsh; occiput and hind-neck very 

 pale amoky grayish, sometimes nearly white. Wing, 11.20~12.25 (11.54); culmen, 

 2.00-2.-85 (2.15): depth of bill at base .55-.65 (.62). Bab. Paciflo coast of North 

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

 B. Tarsus longer than midd'e toe with claw. 



6. II. lamme. Fore-neck rich chestnut in summer ; head and neck piumbeous-gray, 

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

 white. Summer plumage: Threat 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. 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; oulmen, 2.25; tarsus, 2.75. 



ITrinator imber (Gunn.) 



THE LOON. 



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



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



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



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

 Golymbus Immer ButiNN. Orn Bor. 1764, 34 (young).— Linn. S. N. ed. 12, 1, 1766, 222. 



Urinator irrimer Stejn. Proc. U, S. Nat. Mus. Vol. 5, 1882,43.-:^. B. S^ R. Water B. N. A.m. 



ii, 1884. 446. 

 Golymbus torguatus BEiJNN. Orn. Bor. 1764, 41.— Laws, in Baird's B. N. Am. 1858, 888.— 



Baibd, B. N. Am. 1859, No. 698.— CouES, Proc. Acad. Nat. Soi. Phila. 1862, 227; Key,1872, 



334; Cheek List, 1873, No. 605; 2d ed. 1882, No. 840.— BiDGW. Nom. N. Am. B. 1881, 



No. 736. 

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



Sw. F. B.-A. ii, 1831, 474.— Nutt. Kan. if, 1834, 513.— AnD. Orn. Biog. iv, 1838, 43, pi. 306: 



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

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

 Meraus ncevius Bonn at. Eno. Meth. Orn. i, 1790, 73. 



Colymbus atrogularis MEyEE &. Wolfe, Tasoh. Tog. Deutschl. ii, 1810, 449 (part). 

 Colymbus hyemalis Beehm, Lehrb. Epr. Tog. ii, 1824, 883.^ 



Has. 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 Gulf of Mexico; noextrallmital American record. 



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

 on the lower part of the neek; fore-neok 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 loneitudinal-white streaks ; upper parts black, beautifully variegated 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 the 

 tip ; iris oarmine; legs and feet "livid grayish blue, their inner sides tinged with pale yel- 



