578 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Western North America, from eastern base of Rocky Mountains and 

 Western Manitoba (Duck Mountain, etc.) to Pacific coast; north to 

 coast district of Alaska (Sitka; Point Gustavus); breeding south- 

 ward to Santa Barbara Islands, California, northern Lower California, 

 Arizona (Santa Catalina, Huachuca, and San Francisco mountains), 

 southern New Mexico (San Miguel County), southwestern Texas 

 (Chisos and Guadalupe mountains), and to mountains of southern 

 Tamaulipas (Miquihuana) — probably also to mountains of Sonora, 

 Chihuahua, Coahuila, and Nuevo Leon; in winter southward through 

 Mexican States of Sinaloa (Mazatlan; Culiacan), Durango (Chacala), 

 Jalisco (Barranca Ibarra; Las Palmas; Zapotlan), Michoacan (near 

 Ahuacana), Colima (Plains of Colima; Colima; Manzanillo), Guerrero 

 (Acapulco; El Limon; Papayo; Acahuitzotla) , Oaxaca (Pluma; 

 Puerto Angel), and to Tres Marias Islands and Cape San Lucas." 



Myiobius pusillus (not Platyrhynchus pusillus Swainson) Gambel, Journ. Ac. 

 Nat. Sci. Philad., i, 1847, 38 (Los Angeles, California, breeding). 



Empidonax pusillus (not of Baird) Cooper and Suckley, Rep. Pacific R. R. 

 Surv., xii, pt. ii, 1860, 170, part (Shoal water Bay and Steilacoom, Washing- 

 ton). 



Empidonax difficilis B.\irl), Rep. Pacific R. R. Surv., ix, Oct., 1858, 198, in text 

 (Fort Steilacoom and Shoalwater Bay, Washington; coll. U. S. Nat. Mas.); Cat. 

 N. Am. Birds, 1859, no. 144 a; ed. 1860 ("Birds N. Am.,)" 198, pi. 76, fig. 2.— 

 Xantus, Proc. Ac. Nat. Sci. Philad., 1859, 190 (Fort Tejon, California).— 

 ScLATER, Cat. Am. Birds, 1862, 230 (California); Cat. Birds Brit. Mus. xiv, 

 1888, 229 (Vancouver L; Mazatlan; Plains of Colima; Tres Marias Islands, 

 etc.).— CouES, Proc. Ac. Nat. Sci. Philad., 1866, 62 (Fort Whipple, Arizona).— 

 Lawrence, Proc. Bost. Soc. N. H., xiv, 1871, 279 (Tres Marias Islands, w.. 

 Mexico).— RiDGWAY, Orn. 40th Parallel, 1877, 544 (Wahsatch Mts., Utah,, 

 breeding); Field and Forest, 1877, 208 (Colorado); Nom. N. Am. Birds, 1881, 

 no. 323; Ibis, 1886, 466.— Belding, Proc. U. S. Nat. Mus., i, 1878, 425 

 (Stockton and Calaveras Co., California); v, 1882, 531 (Cerros I., Lower 

 California); v, 1883, 542 (Cape San Lucas); vi, 1883, 348 (Victoria Mts., 

 Lower California, winter). — Brewer, Proc. U. S. Nat. Mus., ii, 1879, 2 

 (descr. nests and eggs). — Mailliard, Bull. Nutt. Orn. Club, vi, 1881, 119 

 (Nicasio, California; nesting habits). — Bean, Proc. U. S. Nat. Mus., v, 1882, 

 161 (near Sitka, Alaska). — Drew, Auk, ii, 1885, 15 (Colorado, breeding 

 from plains to 10,000 ft.). — American Ornithologists' Union, Check 

 List, 1886, no. 464.— Scott, Auk, iv, 1887, 19 (Santa Catalina Mts., Ari- 

 zona, June to Oct.). — Mearns, Auk, vii, 1890, 256 (San Francisco Mts., 

 Arizona, breeding nearly to timber line; notes).— (?) Nutting, Bull. Labr. 

 N. H. State Univ. Iowa, ii, 1893, 272 (Grand Rapids, lower Saskatchewan, 

 common).— Bendire, Life Hist. N. Am. Birds, ii, 1895, 298. pi. 2, figs. 24, 25 

 (eggs). — Grinnell (J.), Auk, xv, 1898, 128 (Sitka, Alaska; habits). — Mitch- 

 ell, Auk, XV, 1898, 309 (San Miguel Co., New Mexico, breeding up to 10,000 

 ft. alt.).— Nelson, North Am. Fauna, no. 14, 1899, 49 (Tres Marias).— 



a The American Ornithologists' Union Check List gives south to Costa Rica, while 

 the "Catalogue of Birds in the British Museum" (xiv, 229) "Western Ecuador" as 

 the southern limit to the range of this species; but I am unable to trace it beyond 

 the States of Guererre and Oaxaca in southern Mexico, either by specimens or authentic 

 reeerde; 



