318 TIMELlIDiE. 



i. p. 544 (18G9) ; Cooper, Orn. Calif, p. 25, cum fig. (1870) ; Coues, 



Key N. Amcr. Birds, p. 77, fig. 18 (18/2) ; *Sc/. ^' Salv. Nomencl. Av. 



Neotr. p. 3 (1873) ; Coues, £. K- West, p. 10 (1874). 

 Hydrobata unicolor, Gray, Gen. B. i. p. 215 (1846). 

 Hydrobata mexicana, Baird, B. N. Amer. p. 229 (1800) ; Dcdl ^ 



^Banii. Trans. Chic. Acad. i. p. 277 (1869) ; Gray, Iland-l. B. i. 



p. 267, uo. 3900 (1809) ; Baird, Bre^ver, and Bidr/w. Hist. N. 



Arner. B. p. 56, pi. v. fig. 1 (1874) ; Coues, B. ' Color. Vail. 



p. 89 (1878) ; Salvin 8f Godm. Biol. Centr.-Anier., Aves, i. p. 44 



(1879). 

 Ciuclus americanus, Auduh. B. Amer. pis. 370, 435 ; S^vains. Faun. 



Bor.-Amer., Birds, p. 173 (1831) ; Nutt.Man. Orn. p. .358 (1832) ; 



Aiidub. Orn. Bioqr. iv. p. 493, v. p. 303 (1839) ; id. B. Amer. 



p. 182, pi. 137 (1841). 

 Cinclus uuicolor, Viyors, P. Z. S. 1830, p. 55 ; Bp. Comp. List B. 



Bur. Sj- N. Amer. p. 18 (1838) ; id. Consp. i. p. 252. 



Adult male (west side of Rocky Mountains ; J. K. Lord). General 

 colour above leaden grey, a trifle darker on the mantle ; crown of 

 head perceptibly darker and incliuing to blackish brown ; wing- 

 coverts leaden grey like the back, with a nearly obsolete fringe of 

 whitish along the tip of the median and greater series ; bastard 

 wing- and primary-coverts blackish brown, the latter slightly washed 

 with leaden grey ; quills blackish brown, the primaries narrowly 

 edged, the secondaries broadly washed with leaden grey, like the 

 back, along their outer edges ; the inner secondaries narrowly 

 fringed with whitish at the tips ; tail blackish brown ; sides of face 

 and ear-coverts dusky blackish, like the crown ; above and below 

 the eye a spot of white, generally larger above than below, but 

 often indistinct in skins ; entire under surface of body leaden brown ; 

 the throat not so grey as the rest of the under surface ; some of the 

 breast-feathers and plumes of the abdomen with faintly developed 

 hoary whitish margins ; under wing-coverts and axillaries like the 

 breast, with more or less distinct whitish tips and margins ; quills 

 ashy brown below, greyer along the edge of the inner webs ; "bill 

 black; legs dark brown" {Baird); legs pinkish white {Mus. 

 Smiths.). Total length 6-7 inches, culmen 0-85, wing 3-6, tail 2-05, 

 tarsus 1*15. 



Adult female. Scarcely to be distinguished from the male, but 

 apparently a little larger ; the crown and sides of the head more of 

 a chocolate-brown. Total length 7"5 inches, culmen 0-8, wing 3-75, 

 tail 2-2, tarsus 1-25. 



Young male. Differs from the adults of both sexes in being of a 

 clearer slaty grey above, the head being also of a slaty grey, hardly 

 at aU darker than the back ; lores, sides of face, throat, and fore 

 neck dull white, with greyish or brown tips to most of the feathers, 

 producing a slightly mottled appearance ; rest of under surface of 

 body slaty grey, obscured by hoary whitish margins to the feathers. 

 Total length 6-4 inches, culmen 0-7, wing 3-7, tail 1-9, tarsus 1-2. 



Ohs. Mexican specimens in the cabinet of Messrs. iSalvin and 

 Godman appear to be of precisely the same species as those from 

 North America, though the two examined by me (S. Mexico and 



