156 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



1895, no. 767. — Dawson, Auk, xiv, 1897, 181 (Okonogan Co., Washington, 

 irregular visitant). — Grinnell, Pub. 2, Pasadena Ac. Sci., 1898, 52 (Los 

 Angeles Cg., California, resident). — Rathbun (S. F.), Auk, xix, 1902, 140 

 (Seattle, Washington, breeding). 



S[ialia] mericana occidentalis Coues, Key N. Am. Birds, 5th ed., i, 190;^, 258. 



Sylvia occidentalis Audubon, Orn. Biog., v, 1839, 41, pi. 393. 



(?) Sidlia cxriilfocnllis VinoRS, Zool. Voy. "Blossom," 1839, 18, pi. 3 (no locality 

 mentioned). 



Sialia mexicana (not of Swainson) Bonaparte, Geog. and Comp. List, 1838, IG — 

 Gambel, Proc. Ac. Nat. Sci. Phila., iii, 184G, 113 (California); Journ. Ac. Nat. 

 Sci. Phila., i, 1847, 37 (do.).— Sclater, Proc. Zool. Soc. Lond., 1857, 126 (Cali- 

 fornia); 1859, 235 (Vancouver I.).— Baird, Rep. Pacific R. R. Surv., ix, 1858, 

 223, part; Cat. N. Am. Birds, 1859, no. 159, part; Review Am. Birds, 1864, 

 63, part (Fort Steilacoom, Washington; Columbia R.). — (?) Xantus, Proc. 

 Ac. Nat. Sci. Phila., xi, 1859, 190, part (Port Tejon, California).— Heermann, 

 Rep. Pacific R. R. Surv. x, 1859, 43 (California). — Cooper and Svckley, 

 Rep. Pacific R. R. Surv., xii. pt. ii, 1860, 173 (Washington and Oregon).— 

 Brown, Ibis, ^1868, 420 (Vancouver I.).— Cooper, Am. Nat., iii, 1869, 32 

 (Montana); Orn. Cal., 1870, 28, part.— Coues, Check List, 1873, no. 17, part; 

 2d ed., 1882, no. 28, part; Birds N. W., 1874, 14, part; Birds Col. Vol., 1878, 80, 

 part. — Baird, Brewer, and Ridgway, Hist. N. Am. Birds, i, 1874, 65, part, 

 pi. 5, fig. 2.— Lawrence, Mem. Bost. Soc. N. H., ii, 1874, 267, part ("Plains 

 of Colima")-a — Bendire, Proc. Bost. Soc. N. H., 1877, 111 (Camp Harney, 

 Oregon, migr.). — Ridgway, Nom. N. Am. Birds, 1881, no. 23, part. — An- 

 thony, Auk, iii, 1886, 172 (Washington Co. , Oregon, summer); Zoe, iv, no. 3, 

 1893, 247 (San Pedro Martir Mts., Lower California, during migration). — 

 Evermann, Auk, iii, 1886, 186 (Ventura Co., California, resident; habits). — 

 Merrill (J. C), Auk, v, 1888, 365 (Fort Klamath, Oregon, breeding). — Chap- 

 man, Bull. Am. Mus. N. H., iii, 1890, 155 (Westminster, British Columbia, 

 breeding).— Palmer (T. S.), Auk, ix, 1892, 310 (Aberdeen, Washington, 

 breeding ?).— Nehrling, Our Native Birds, i, 1893, 83; ii, 1896, pi. 20, fig. 1. 



[Sialia] mexicana Coues, Key,N. Am. Birds, 1873, 76, part. 



S[ialia] mexicana Coues, Key N. Am. Birds, 2d ed., 1884, 258. part. — Ridgw.'VY, 

 Man. N. Am. Birds, 1887, 581, part. 



(?) Sialia mexicana hairdi (not of Ridgway?) Merrill (.1. C<.), Auk, xv, 1898, 21 

 (Fort Sherman, Idaho, breeding).?) 



SIALIA ARCTICA Swainson. 

 MOUNTAIN BLUEBIRD. 



Adult male in summer. — Above ]:)lain ricli tiirc[ii oi.se, cerulean, or 

 Sevres blue the wings and tail slightly more violaceous (more cobalt) 

 blue; shafts of remiges and rectrices black, and terminal portion of 

 primaries dusky; sides of head, chin, throat, chest, breast, and sides, 

 plain turquoise or light cerulean blue, decidedly paler and less bright 

 than color of upper parts; abdomen, hinder flanks, anal region, and 

 shorter under tail-coverts white; longer under tail-coverts pale tur- 

 quoise or cerulean blue tipped or margined with white; bill, legs, and 

 feet, black; iris, dark brown. 



a The specimen so labeled is a California example of i9. jn. occidentalis. 

 b Specimens from Idaho not ^een by me. 



