BIRDS OF NORTH AND MIDDLE AMERICA. 251 



Southwestern border of ^Mexican platoau. in States of Jalisco (Etzat- 

 lan; San Sebastian; Jacala; Mesquitic; Bolaiios), Miciioacan (Queren- 

 daro), and Zacatecas (El Conejo; Monte Escobedo). 



Peucxa ruficeps fusca Nelsox, Auk, xiv, Jan., 1S97, 02 ( Etzatlan, Jalisco, s. w. 

 Mexico; U.S. Nat. Mus.)- 



AIMOPHILA RUFICEPS EREMCECA (Brown). 

 ROCK SPARROW. 



About the same size as A. r. scottii., but wing averaging- longer, 

 tarsus shorter, bill stouter, and coloration much grayer above and paler 

 below; the back and scapulars smoke gray or olive-gray (sometimes 

 almost ash gray) narrowly streaked with brown, these streaks often 

 inclosing more or less distinct shaft-lines of black or dusky; chin, 

 throat, and abdomen almost white (often quite so in summer plumage). 



AduJttiude.—hGngth (skins), 137.16-152.4:0(144.27); wing, 65.53- 

 68.58 (67.06); tail, 66.04-71.12 (68.33); exposed culmen, 11.68-12.95 

 (12.45); depth of bill at base, 6.35-7.11 (6.86); tarsus, 19.30-20.83 

 (20.07): middle toe, 15.24-15.75 (15.49).^ 



Adult fcinah.^l^angth. (skins), 138.43-149.86 (144.02); wing, 61.21- 

 65.28 (63.25); tail, 62.23-72.39 (66.80); exposed culmen, 11.43-12.95 

 (12.19); depth of bill at base (one specimen), 6.60; tarsus, 19.05-20.57 

 (19.81); middle toe, 14.99-15.75 (15.49).- 



Limestone hill districts of middle Texas, from Kinney and Maverick 

 counties, on the Rio Grande, northeastward to Cook County and west- 

 ward at least to Tom Green County;^ south in winter to Puebla 

 (Chachapa)* and Vera Cruz (Maltrata, March), eastern Mexico 



Peucxa ruficeps {not Ammodromus ruficeps C^issin) Allex, Bull. Nutt. Orii. Club, 

 iii, 1878, 188 (Gillespie Co., Texas). 



Peuaea ruficeps eremoeca Browx, Bull. Nutt. Oru. Club, vii, Jan., 1882, 26, 38 

 (Kendall Co., Texas; coll. N. C. Brown). — Ragsd.\le, Bull. Nutt. Orn. Club, 

 vii, 1882, 122 (Gillespie Co., Texas); Auk, ix, 1892,- 73 (chaparral belt. Cook 

 Co., Texas, :May, Dec.).— Ridgway, Bull. Nutt. Orn. Club, vii, 1882, 258.— 

 Americax Ornithologists' Uxiox, Check List, 1886, no. 5806. — Cooke, Bird 

 Migr. Miss. Val., 1888, 207 (Gillespie Co., etc., Texas). — Attwater, Auk, 

 ix, 1892, 338 (San Antonio, Texas, summer resid.). 



P.[eucasa'] ruficeps eremoeca Ridgway, Man. N. Am. Birds, 1887, 429. 



Peucaea ruficeps eremoeca Reichexow and Schalow, Journ. fiir. Orn., 1884,407. 



Aimophila ruficeps eremceca Ricgway, Auk, xvi, Jan., 1899, 81. — Americax Orxi- 

 THOLOGiSTs' Uxiox COMMITTEE, Auk, xvi, 1899, 120. 



^ Seven specimens. 



^ Six specimens. 



' Some specimens from Presidio and >Iitchell counties may be referable to this 

 form, but those examined by me, as nearly as can be determined from their worn 

 breeding plumage, seem to be intermediate between the present bird and -1. /•. scottii. 



* Specimen in Salvin-Godman collection, collected Jan. 17, 1889, by ^rof. F. 

 Ferrari-Perez. 



