250 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



AIMOPHILA RUFICEPS AUSTRALIS (Nelson). 

 OAXACA SPARROW. 



Veiy similar in coloration to .1. /•. scottl!^ but decidedly .smaller and 

 with shorter and thicker bill. 



Adult //^r//^.— Length (.skins), 1^9.70-144.78 (142.24); wing, 63.50- 

 64.01 (63.75); tail, 66.55-68.58 (67.56); exposed cuhiien. 11.43-12.70 

 (ll.lU): depth of bill at base, 6.86; tarsus, 20.32; middle toe, 15.24.' 



Adult female. ^l^Qwgth (skins), 134.62-138.43 (136.40); wing, 59.69; 

 tail, 60.45-64.77 (62.48); exposed culmen, 11.43-13.97 (12.70); depth 

 of bill at base, 6.35-7.11 (6.73); tarsus, 20.57-20.83 (20.70); middle toe, 

 14.48-15.24 (14.66).' 



Southern extremity of Mexican plateau (up to 6,000 or 7,000 feet in 

 mountains) in State of Oaxaca (city of Oaxaca, near Totolapa). 



Pcuca:a rujiceps {not Amritodromus ntjitrps Cassin) Sclater, Proc. Zool. Soo. Lond., 



1859, 380 (Oaxaca). 

 [Peuava] buucardi (not Zonoirichia boucanfi Sclater) Sclater and Salvin, Nom. 



Av. Neotr., 1873, 32, part. 

 Peitara houcardi Salvin and (todmax, Biol. Centr.-Ani., Ave^, i, 1886, 391, part 



(Oaxaca). 

 [Peu(\ra rufireps] var. houcardi Ridgway, in Baird, Brewer, and Ridgway'^ Hist. 



N. Am. Birds, ii, 1874, 38, part (Oaxaca; not description). 

 Peucari rvficeps houcardi American Ornithologists' Union, Check List, 1886, no. 



580a, part. 

 P. [eucseal rujiceps houcardi Ridgway, Man. N. Am. Birds, 1887, 429, part (Oaxaca). 

 Peucpca rujiceps aiistralis Nelson, Auk, xiv, Jan., 1897, 63 (City of Oaxaca; U.S. 



Nat. ilus.). 



AIMOPHILA RUFICEPS FUSCA (Nelson). 

 ETZATLAN SPARROW. 



Similar to J.. /■. austral Is but decidedly darker, the general aspect of 

 upper parts being, in sununer plumage, nearl}" uniform dark rusty 

 brown, with the pileum uniform deep chestnut; in winter plumage 

 the back and scapulars more broadly streaked with chestnut-brown or 

 Vandyke brown on a more olivaceous ground color. 



Adult male.— length {skins), 134.62-143.51 (138.18); wing, 61.47- 

 66.04 (64.26); tail, 64.26-68.07 (66.29); exposed culmen, 11.18-13.21 

 (11.68); depth of bill at base, 6.60-7.37 (6.86); tarsus. 19.81-22.35 

 (20.83); middle toe, 13.97-15.49 (14.73).- 



AduUfemalt.—hength (skins), 132.08-142.24 (138.18): wing, 58.42- 

 64.77 (61.72); tail, 60.96-66.04 (63.25); exposed culmen, 10.41-12.45 

 (11.68); depth of bill at base, 6.35-7.11 (6.86); tarsus, 19.81-22.10 

 (20.83); middle toe, 13.97-15.24 (14.99).' 



' Two specimens. '^ Seven specimens. ^ Six specimens. 



d 



