URINATORID.K— THIC LOONS. 253 



with upper imrt of head and hind part of neck grayish; throat andfore-neok black, 

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

 of the neck, between the black and tlie gray. 

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

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

 ]:!.2U (12.55); culmen2.50-2.&". 12.60); depth of bill at base. .75-. 80 (.78). 

 t-t. U. paoificus (i'aci.ffc hoon). 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, 11.2U-12.25 (11. -W); culmen, 

 2,00-2.S5 (2.15): depth of bill at base ..55-.65 (.62). Bah. Pacific coast of North 

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

 B. Tarsus longer than midd e toe irith 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. Slimmer plumage: Throat and fore-neck plumbeous, like rest of head 

 and neek, but marked down the middle wi'ha wedge-shaped patch or stripe of 

 rich chestnut. Winter iiluinaije and young: Throat and fore-neck white. 

 Ddwny young: Above uniform dusky, or sooty slate; lower parts p.iler and 

 more grayish. Length 21. 00-2". d"; wing. 10.00-11.50; culmen. 2.25; tarsus, 2.75. 



Urinator imber (Guiin.) 



THE LOON. 

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

 Cohnnljiis imber GuNN. Trond. Selsk. Skr. i, 1761, pi. ill. 



Vrinnlor imber Ste.i.v. Orn. Kamtsch. 188.i, 313.— A. O. U. Check List, 188C, No. 7.— 



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

 Colymbus immer BbOnn. Orn Bor. 1764, 31 (young).— Linn. S. N. ed. 12, 1, 1766. 222. 



I'rinalor immer Stejs. Proc. U. 8. Nat. Mus. Vol. 5, 1882,43.— B. B. & It. Water B. N. Am. 



ii, 18S4, H>i. 

 Colymbus loniiiatus BrCnn. Orn. Bor. 1764, 41.- Lawb. in Baird's. B. N. Am. 1858,888.— 



Baibd, B. N. Am. 1K9, No. 698.— Coues, Proc. Acad. Nat. 8ci. Phila. 1862, 227; Key. 1872, 



334; Check List, 1873. No. 6U5; 2d ed. 1882, No. 810.— Riuow. Nom. N. Am. B. 1881, 



No. rjo. 

 Colymbus glaci'iti" LiN.v. S. N. ed. 12,i, 1766,221.— Wii.s. Am. Orn. i.x, 1821, 84, pi. 74.-RicH. ii 



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



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

 Colymbus mnxiinus GuKN. Trond. Selsk. Skr. iii, I76.'i, 125. 

 Mergus nti-vins BoNNAT. Enc. Meth. Orn. i, 1790, TS. 



Colymbus atrogiilaris Meveb &. WoLPE, Tasch. Yog. Deutschl. ii, 1810, 419 (part). 

 I'olymbua /tveinafi'x.BBEBM, Lehrb. Eur. Vog. ii, 1821,883. 



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

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

 northward: winering south to the Gulf of Me.vico; no extralimitjil American record. 



8p. Chab. Aitnlt. Head and neck dull black, with a greenish rellection, 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 vari'gatnd with while dots, 

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

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

 stieaked with black, the sides and Hanks black, dotted with white. Bill black, paler at the 

 tip; Iris carmine ; legs and feet "livid grayish bUn', tli<'ir Inner sides tinged with pale yet- 



