URINATORID/E THE LOONS. 2.")3 



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 26.00-29.00; wing 12.15- 

 13.20(12.55); culmen2.50-2.85 (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-neck 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 .55- .65 (.62). Halj. Pacific coast of North 

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

 B. Tarsus longer than midd e toe iritli 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 pjumbeous, 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; culmen, 2.25; tarsus, 2.75. 



TJrinator imber (Gnnn.) 



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. 



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

 Colymbus immer BRUNN. Orn Bor. 1764, 34 (young). LINN. S. N. ed. 12, i, 1766, 222. 



Urinator immer STEJN. Proc. U. S. Nat. Mus. Vol. 5, 1882.43.-B. B. & E. Water B. N. Am. 



ii, 18S4, 440. 

 Colymbus torquatus BKUNN. Orn. Bor. 1764, 41. LAWB. in Baird's B. N. Am. 1858,888. 



BAIED, 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. Nom. N. Am. B. 1881, 



No. 736. 

 Colymbus glacialis LINN. S. N. ed. 12, i. 1766, 221. WILS. Am. Orn. ix, 1821, 84, pi. 74. KICH. & 



Sw. F. B.-A. ii, 1831, 474. NUTT. Man. ii, 1834. 513. A UD. Orn. Biog. iv, 1838, 43, pi. 306; 



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



Colymbus maximus GUNN. Trond. Selsk. Skr. iii, 1765, 125. 

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



Colymbus atrogularis MEYER & WOLFE, Tasch. Yog. Deutschl. ii, 1810, 449 (part). 

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



HAB. 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; no extralimital American record. 



SP. CHAE. Adult. Head ami 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 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 carmine ; legs and feet "livid grayish blue, their inner sides tinged with pale yel- 



