670 BULLETIN 50, UNITED STATES NATIONAL MITSEUM. 



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

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



\^Ge()thliijni\ trtcJian Coites, Key N. Am. Birds, 1872, 107, part. — Sclatek and 

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



G\_eothlypis'] trichas Coues, Key N. Am. Birds, 2d ed., 1884, 310, part. 



Geothlypu trichis Merriam, Ann. Rep. U. S. Geol. Surv. for 1872 (1873), 705 

 (Ogden, Utah, breeding). 



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



Geothlypis trichas var. trichas Ridgway, Am. Journ. Sci., iv, Dec, 1872, 458, i)art. 



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

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



(?) Trichas marylandica {not Sylvia mar ilandica 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 marylandicus 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 marilandiciis Woodiiouse, in Rep. Sitgreaves' Expl. Zufii and Col. R., 

 1853, 51, part. 



(?) Trichas delafieldii (not Sylria delaficldii Audubon) Heermann, Journ. Ac Nat. 

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

 40, part (California). 



Geoihlypis trichas occidentalis Brewster, Bull. Nutt. Orn. Club, viii, July, 1883, 

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

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

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

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

 Auk, xii, 1895, 142 (San Fernando, Lower California). — Merrill, 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 occidentalis Ridgway, Man. N. Am. Birds, 1887, 523, part. 



Geat hlypis occidentalis Sharpe, Cat. Birds Brit. Mus., x, 1885, 351, footnote. 



Geothlypis 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 much smaller bill, shorter 

 win^- and tail, and duller coloration, with whitish band bordering pos- 

 terior margin of the black ''mask"" averaging- narrower, and 3'ellow of 

 under parts usually less orange. 



Adult male.— IjQwgXh (skins), 114-125 (110.7); wing, 52.5-58 (55.8); 

 tail, 49.5-57 (52.6); exposed culmen, 10-11 (ln.3); tarsus, 20-21 (20.1); 

 middle toe, 18-11 (13.4). ^ 



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



^ Seventeen specimens. 



