8. siALiA. 333 



of South British Cohimbia, the rangos on the Pacific coast as far 

 south as California, and the Eocky Mountains as far south as the 

 Colorado basin. 



o, 6. c?, e. 2 ad. sk. AVest side of Rocky Moim- J. K. Lord, Esq. [P.]. 



tains. 



d. Ad., e,f. Jur.sk. Sumass Prairie, British J. K. Lord, Esq. [C.]. 



Cohimbia. 



g. Juv. sk. California. Mr. Grueher [P.l. 



h. Ad. sk. Cahfornia. Pm-chased. 



6. Sialia arctica. 



Ervthaca (Sialia) arctica, Stv. <^- Sich. Faun. Bor.-Amer., Birds, p. 209 

 pi. xxxix. (1831). 



Sialia arctica (Swains.), Kutfall, Man. Orn. ii. p. 573 (1834) ; Bj). 

 Comp. List B. Eur. S,- N. Anier. p. 16 (1838) ; Audub. B. Amer. 

 8to, ii. p. 178, pi. cxxxvi. (1839) ; Gray, Gen. B. i. p. 184 (1846); 

 Bp. Consp. i. p. 298 (1850) ; Baird, Cass. &,- Laicr. B. N. Amer. 

 p. 224 (1858) ; Scl. Cat. Amer. B. p. 11 (1862) : Baird, Beview, 

 p. 64 (1864) ; Gray, Band-l. B. i. p. 230. no. 3314 (1809) ; Cooper, 

 B. Calif, ed. Baird, p. 29 (1870) ; Coues, Kci/ N.-A7ner. B. p. 76 

 (1872) ; id. B. N. West, p. 14 (1874) ; Baird. Breicer, Sr Bide/u: 

 Hist. N.-Amer. B. i. p. 67 (1874) ; Coues, Birds Colorado fall. 

 p. 82 (1878). 



Svlvia arctica (Swains.), Audub. Orn. Biogr. v. p. 38, pi. cccxciii. 

 'iios. 2, 3 (1839). 



Sialia macroptera, Baird, B.tpl. Su7-v. Vail. G. S. Lake, Utah, pp. 314, 

 328(1852). 



Sialia arctica (Swains.), Stevenson, U.S. Geol. Surv. Terr. p. 463 

 (1871). 



In the adult male in hreeding-plumage the general colour of the 

 upper parts is brilliant metallic azure-blue, greenish on the back, 

 and -with violet reflections on the vrings and two centre tail-feathers ; 

 greater wing-covcrts, innermost secondaries, and the tips of the 

 remaining secondaries and primaries and of the tail-feathers 

 brown ; lores, car-coverts, cheeks, chin, throat, breast, flanks, axil- 

 larics, and under wing-coverts dull verdigris-blue, shading into 

 nearly white on the centre of the belly and under tail-coverts, the 

 longest feathers of the latter being slightly suff'used with blue ; 

 inner margin of quilLs pale bluish grey. Bill black. "W'ings with 

 the second, -third, and fourth primaries nearly equal and longest, 

 bastard primary 0-7 to 0-55 inch. Legs, feet, and claws black. 

 Length of wing 4-6 to 4-4 inches, tail 2-95 to 2-75, culmen 0-7 to 

 0-63, tarsus 0-9 to 0-85. 



The female has the wings, rump, upper tail-coverts, and tail of 

 the same colour as the male, but paler ; the rest of the upper parts 

 are greyish brown, veiy obscurely tipped with pale metallic verdigris- 

 brown. The uuderparts are pale greyish brown, shading into 

 nearly white on the centre of the belly, under tail-coverts, and 

 under wing-coverts, and slightly suffused with verdigris-blue on the 

 axillaries only. After the autumn 7noult the feathers of the upper 

 parts have very obscure brown fringes, and the outer webs of the 

 greater wing-coverts and innermost secondaries arc blue, whilst all 



