HELMINTHOPHAGA RUFIOAPILLA. 427 



276, i ad; Ca—lOJ— 3^5—25—^—1— 2i^—l|. Same remarks. 



277, (? ad.; 6|— lOf— 3^- 2ii— ^— if— 2J— IJ. Same remarks. 



278, <? ad.; 7— 10a_3i— 2if - J_i|_22— I. Same remarks. 



270, ^rt^.; (ff- lOi— 3y^g— 2;i— .J— ^— 2/g.— 1. Tarsi, dark sieuna-brown ; toes, 

 more blackish, distinctly pale yellowish beneath. 



280, Sad.; Oji— lOg— 3J— 2-jf— i— 3— 2f— 1. Same remarks. 

 2Sl,Sa<1.; 6,4— 10A—3'i—2i|—.i— 8—23— IJ. Same remarks. 



282, Sad.; 6i— 10|— 3|— 2if— i— f— 2|— [?). Same remarks. 



283, (?rtrf.; 61— lOf— 31—2-51— J— i?—2f—(!). Same remarks. 



Family MNIOTILTID^E— American Warblers. 

 Helminthophaga ruficapilla. 



Nashville Warbler. 



Sijlvia ruficapilla, WiLS., Am. Orn., Ill, 1811, 120, pi. 27, fig. 3, 

 Helminthophaga ruficapilla, Baird, B. N. Am., 1858, 256; Gat. N. Am. B., 1859, No. 

 183; Review, 1864, 175.— B. B. & R., Hist. N. Am. B., I, 1874, 196, pi. Xi, 

 figs. 7, 8.'— Cooper, Orn. Cal., 82.— Coues, Key, 1872, 94 ; Check List, 1873, 

 No. 67 ; B. N.W., 1874, 50.— Henshaw, 1875, 188. 



Although not observed in summer, this bird was more or less com- 

 mon in September in the thickets along the streams in the lower portion of 

 the canons. It is not as yet definitely known whether this species breeds 

 anywhere within the Western Region, or whether, on the other hand, the 

 individuals which have been obtained at so many localities west of tlie 

 Rocky Mountains were migrants from the Eastern Region, which, near the 

 northern boundary of the United States, extends so much farther toward 

 the Pacific coast. The same doubt exists in the case of Lanirin'o soUtar'ms. 

 It is well known, however, that toward our northern b(»rder the Rocky 

 Mountains form much less of a barrier to the westward range of eastern 

 species, many of which, following the head-waters of the Yellowstone and 

 other tributaries of the Missouri River, have but a short flight to reach the 

 head-streams of the Columbia, and thus reach the Pacific coast in Oregon 

 and Washington Territory, by passing down the valley of the latter stream. 



'On p. 191 a "var. gutturalis" is characterized, supposed to be distinguished by 

 Laving the yellow of the throat confined strictly within the maxillae, and not, as in 

 true ruficapilla, covering the cheeks; the race being based on No. 901 of this catalogue, 

 = No. 53,354, National Museum catalogue. Should this peculiarity prove constant, 

 the western birds may be distinguished by that name. Figure 8, Hist. N. Am. Birds, 

 quoted above, represents this form. 



