BIRDS OF NORTH AND MIDDLE AMERICA. 733 



Southwestern United States and adjacent parts of northern Mexico, 

 from the upper Rio Grande Valley to the Colorado Valley, thence 

 southward through Lower California (except more northern portion of 

 Pacific side) to Cape St. Lucas and Margarita Island," north to southern 

 Nevada (Vegas Valley, Bunkerville, etc.) and Inyo County, south- 

 eastern California, west to eastern Riverside County, California (Palm 

 Springs); south to Tamaulipas (Jaumave, breeding), Nuevo Leon (Rod- 

 riguez, January), Chihuahua, and Sonora (Batamotal, April 20; 

 Senoyta, January). 



Oulicivora atricapilla (not of Swainson) Lawhencb, Ann. Lye. N. Y., v, 1852, 124 

 (Texaa).— Baird, in Stansbury's Rep. Gt. Salt Lake, 1852, 328 (Texas).— 

 Heermann, Journ. Ac. Nat. Sci. Phila., ii, 1853, 262, part (Fort Yuma^ Cali- 

 fornia). — Cassin, Illustr. Birds Cal., Tex., etc., 1854, pi. 27 (Texas; Mexico). 



Oulicivora mexicana (not of Bonaparte) Cassin, Illustr. Birds Cal., Tex., etc., 

 1854, 163, 164 (Texas). 



Oulicivora plumbea Baird, Proc. Ac. Nat. Sci. Phila., vii, June, 1854, 118 (Bill 

 Williams R., Arizona; coll. U. S. Nat. Mus.;=young male). 



PoHoptUa plumbea Baihd, Rep. Pacific R. R. Surv., ix, 1858, 382; Cat. N. Am. 

 Birds, 1859, no. 283; ed. 1860 (Birds N. Am.), pi. 33, fig. 1; Rep. U. S. and 

 Mex. Bound. Surv., ii, pt. 2, 1859, 14 (Boca Grande, Mexico); Rep. Ives' 

 Colorado Exp., pt. v, 1861, 6; Review Am. Birds, 1864, 74. — Kennerly, Rep. 

 Pacific R. R. Surv., x, pt. iv, no. 3, 1859, 26, pi. 33, fig. 2 (Bill Williams 

 Fork; Camp 113).— Henry, Proc. Ac. Nat. Sci. Phila., 1859, 107 (New Mex- 

 ico). — CouKS, Ibis, 1865, 538, in text (Arizona); Proc. Ac. Nat. Sci. Phila., 

 1866, 66 ( Bill Williams R. , Fort Yuma, Fort Mojave, Colorado Chiquito, etc. ) ; 

 Check List, 1873, no. 25; 2d ed., 1882, no. 38; Birds Col. Val., 1878, 105.— 

 Cooper, Am. Nat., iii, 1869, 474, 479 (Fort Mojave) ; Orn. Cal., 1870, 37.— 

 Baird, Brewer, and Ridgway, Hist. N. Am. Birds, i, 1874, 80, pi. 6, fig. 6. — 

 Henshaw, Rep. Orn. Spec. Wheeler's Surv., 1874, 155 (Arizona). — Brewster, 

 Bull. Nutt. Orn. Club, vi, 1881, 102 (crit; synonymy); vii, 1882, 77 (Tucson, 

 Camp Lowell, and near Yuma, Arizona; habits; crit.; descr. nest and eggs); 

 Bull. Mus. Comp. Zool., xli, 1902, 210 (La Paz, Lower California, Mar., 

 Apr.). — Ridgway, Nom. N. Am. Birds, I88I, no. 28. — Belding, Proc. U. S. 

 Nat. Mus., V, 1883, 534 (Cape St. Lucas). — Sharpe, Cat. Birds Brit. Mus., x, 

 1885, 450. — American Ornithologists' Union, Check List, 1886, no. 752. — 

 MoRCOM, Bull. Ridgway Orn. Club, no. 2, 1887, 56 (Yuma, Arizona, breed- 

 ing). — Scott, Auk, v, 1888, 166 (near Tucson, and in valley of San Pedro R., 

 Arizona, resident; remarks on plumage). — Johnson, Auk, iv, 1889, 280 (Palm 

 Springs, San Diego Co., California, 8 specs., Apr.). — Townsend (C. H.), 

 Proc. U. S. Nat. Mus., xiii, 1890, 137 (Cape St. Lucas, Apr. 7; La Paz, Mar. 

 14; Concepcion Bay, Mar. 19).— Stephens, Auk, vii, 1890, 296, 297 (Colorado 



« The only specimens examined from Margarita Island (two in number) very likely 

 represent a different form; both have decidedly shorter wings and longer bills 

 than specimens from the mainland of Lower California; they have the upper parts 

 decidedly darker, the dull slate color of the pileum contrasting abruptly and strongly 

 with the dull white of the loral region; there is, apparently, a distinct whitish 

 crescentic mark immediately behind the dark grayish auricular region, a feature 

 which I have. not been able to find in any specimen of true P. plumbea. Both speci- 

 mens were skinned from alcohol; one is an immature male, the other probably an 

 adult female. Should the bird from Margarita Island prove to be distinct, I propose 

 for it the name PoUoptila margariiie. ~ 



