BIRDS 0¥ NORTH AND MIDDLE AMERICA. 245 



[Hicnwphlla'] rufescena Sclater and Salvix, Nom. Av. Xeotr., 1873, 33. 

 E.\_mheriiagra^ mfescens Gray, Gen. Birds, ii, 1849," 361. 

 \_Embernagra'] rufescena Gray, Hand-list, ii, 1870, 91, no. 7343. 

 Embernagra pyrgitoides Lafresxaye, Rev. Zool., 1839, 97 (Mexico). 

 [Buarremon'] pyrgitoides Bonaparte, Consp. Av., i, 1850, 484 (Mexico). 

 Geospizopsis melanotis Bon.\parte, Compt. Rend., xlii. May, 1856, 955 (Mexico). — 



Sclater, Proc. Zool. Soc. Lond., 1856, 306 (Cordova, Vera Cruz). 

 Aimophila rufescens discolor Ridgway, Proc. U. S. Nat. Mns., x, sig. 37, Aug. 6, 1888, 



587, in text (Segovia R., Honduras; U. S. Nat. Mus. ). 



AIMOPHILA RUFESCENS PALLIDA Nelson and Palmer. 

 ETZATLAN SPARROW. 



Similar to A. r. rnfe><<jen>i, liut bill more slender, tarsi and toes shorter, 

 and coloration paler and much more uniform above and much less 

 butty beneath; the pileum paler chestnut, without any distinct median 

 grayish stripe (usually without trace of the latter) and without any 

 black lateral border or suffusion (except sometimes on anterior por- 

 tion): no black streaks on hindneck nor back (except, rarely, a few 

 indi.stinct ones on the latter). 



Adult ///r/Z(?.— Leng-th (skins), 165. 10-177. So (172.97); wing, 73.15- 

 75.14 (71.17); tail, 73.15-77.-1:7 (75.18); exposed culmen, 15.75-16.51 

 (16.26); depth of bill at base, 10.16-10.1:1; tarsus, 23.37-25.40 (24.38); 

 middle toe, 17.78-18.03 (17.90).* 



A<Mtfnaale.—'L^\\<gt\i (skins), 177.80-182,88 (180.34); wing, 68.58- 

 71.12 (69.85); tail, 71.63-72.39 (72.01); exposed culmen, 15.24-15.75 

 (15.49); depth of bill ac base, 10.16-lo.41 (10.28); tarsus, 23.11-23.62 

 (23.37); middle toe, 17.78-18.03 (17.90).- 



Southwestern portion of Mexican plateau, in States of Michoacan 

 (Uruapam), Jalisco (Etzatlan; Ameca; San Sebastian; Juanacatlan), 

 and Sinaloa (Plomosas). 



Aimophila rufescens pallida Nelsox and Palmer, Auk, xi, no. 1, Jan., 1894, 43 

 (Etzatlan, Jalisco, s. w. Mexico; U. S. Nat. Mus.). 



AIMOPHILA RUFESCENS SINALOA Ridgway. 

 SINALOA SPARROW. 



Similar to A. r. pallida^ but wing and tail longer, bill shorter and 

 relatively deeper, toes shorter, and coloration paler and grayer above 

 and at the same time more buff}' beneath; sides of head paler gray, 

 and brown postocular streak narrower. 



Adult male. — Length (skin), 177.80; wing, 77.47: tail, 83.82; exposed 

 culmen. 14.73; depth of bill at base, 10.16; tarsus, 24.89; middle toe, 

 16.51. « 



^ Four specimens. ^ Two specimens. ^ One specimen, the type. 



