670 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Club, vii, 1882, 139 (Cienega Station, Arizona; crit.).— Shaepb, Cat. Birds 

 Brit. Mus., X, 1885, 351, part. 



[Oeothlypis] trichas CoTOS, Key N. Am. Birds, 1872, 107, part.— Sclatek and 

 Salvin, Nom. Av. Neotr., 1873, 9, part. 



GleotUypis] trichas Coues, Key N. Am. Birds, 2d ed., 1884, 310, part. 



Geothlypis trichis Merbiam, Ann. Rep. U. S. Geol. Surv. for 1872 (1873), 705 

 (Ogden, Utah, breeding). 



[Oeothlypis trichas'] a. trichas Ridgway, Am. Journ. Sci., iv, Dec, 1872, 458, part. 



Oeothlypis trichas var. trichas Ridgway, Am. Journ. Sci., iv, Dec, 1872, 458, part 



lOeothlypis trichas] var. trichas Ridgway, in Baird, Brewer, and Ridgway's Hist 

 N. Am. Birds, i, 1874, 296, part. 



(?) Trichas marylandica (not Sylvia marilandica Wilson) Nuttall, Man. Orn. U. S. 

 and Can., 2d ed., i, 1840, 454, part (Lewis River). — Gambel, Journ. Ac. Nat. 

 Sci. Phila., i, 1847, 37, part (California). 



(?) Trichas marylandieus Gambel, Proc. Ac. Nat. Sci. Phila., iii, 1846, 155, part 

 (California). 



Trichas marilandica Henry, Proc. Ac. Nat. Sci. Phila., vii, 1855, 309 (New 

 Mexico). 



Trichas manlandicus Woodhouse, in Rep. Sitgreaves' Expl. Zurii and Col. R., 

 1853, 51, part. 



(?) THchas delajieldii (not Sylvia delafieldii Audubon) Hbebmann, Journ. Ac. Nat. 

 Sci. Phila., ii, 1852, 263, part (California); Rep. Pacific R. R. Surv., x, 1859, 

 40, part (California). 



Oeothiypis trichas occidental-is Bkbwstee, Bull. Nutt. Orn. Club, viii, July, 1883, 

 159 (Truckee River, Nevada; coll. W. Brewster). — American Ornitholo- 

 gists' Union, Check List, 1886, no. 681a, part.— Scott, Auk, v, 1888, 35 (Tuc- 

 son, Arizona). — Goss, Hist. Birds Kansas, 1891, 581, part. — Meeeiam, N. 

 Am. Fauna, no. 5, 1891, 105 (Fort Lapwai, Idaho, breeding). — (?) Anthony, 

 Auk, xii, 1895, 142 (San Fernando, Lower Cahfornia). — Mereill, Auk, xv, 

 1898, 19 (Fort Sherman, Idaho, breeding).— Palmer (W.), Auk, xvii, 1901, 

 221 (diagn.; crit.).— Bates, Proc. Nebr. Orn. Un., 2d ann. meet., 1901, 75 

 (Cherry Co., n. w. Nebraska, Sept. 10). 



G[eothlypis] trichas ocddentalis Ridgway, Man. N. Am. Birds, 1887, 523, part. 



Oeothiypis occidenialis Sharpe, Cat. Birds Brit. Mus., x, 1885, 351, footnote. 



Oeothiypis trichas melanops (not G. melanops Baird) Allen, Bull. Am.Mus. N. H., 

 V, 1893, 40 (San Diego, n. w. Chihuahua, May 6). 



GEOTHLYPIS TRICHAS ARIZELA Oberholser. > 

 PACIFIC YELLOW-THROAT. 



Similar to G. t. occidentalis, but with mucli smaller bill, shorter 

 -wing and tail, and duller coloration, with whitish band bordering pos- 

 terior margin of the black "mask" averaging narrower, and yellow of 

 under parts usually less orange. 



AdMltmale.—'Lmgth (skins), 11-1-125 (119.7); wing, 52.5-58 (55.8); 

 tail, 49.5-57 (52.6); exposed eulmen, 10-11 (10.3); tarsus, 20-21 (20.4); 

 middle toe, 13-14 (13.4).^ 



Adult female.— IjQwgih (skins), 108-120 (116); wing, 51-53 (51.9); 



^ Seventeen specimens. 



