238 BULLETIN 50, UNITED STATE8 NATIONAL MUSEUM. 



the flanks and under tail-coverts pale grayish brown or light buffy 

 brown; backand scapulars mostly cinnamon-rufous or chestnut, more or 

 less streaked with black; rump and upper tail-coverts light grayish 

 brown, the latter more or less margined terminally with paler; tail 

 dusky, with grayish brown edgings; lesser wing-coverts cinnamon- 

 rufous; middle coverts black, edged with fulvous and tipped with 

 white, forming a narrow band; greater coverts similar, but fulvous 

 edgings broader and whitish tips narrower; remiges dusky, the ter- 

 tials more or less edged with fulvous and primaries narrowly edged 

 terminally with pale gray; maxilla black; mandible light colored; iris 

 brown; legs and feet horn brownish. 



Adult male.— h&ngth (skins), 142.2i-160.02 (151.89); wing, 65.28- 

 70.10 (66.80); tail, 69.85-81.79 (76.96); exposed culmen, 12.45-13.46 

 (12.95); tarsus, 19.05-22.10 (20.57); middle toe 14.48-15.24 (14.99).' 



Adult female.— Length (skins), 140.97-160.02 (149.61); wing, 58.42- 

 66.04 (62.23); tail, 66.55-76.20 (71,12); exposed culmen, 12.45-13.21 

 (12.95); tarsus, 20.07-20.57 (20.32); middle toe, 13.97-16.51 (14.99)." 



Southern portion of Mexican plateau, in States of Puebla (Chietla), 

 Morelos (Cuernavaca; Yautepec) and Guerrero (Tlapa; Tlakisala). 



H.\_cemophila\ humeralis Cabanis, Mus. Hein., i, Apr., 1851, 132 (Mexico; Heine 



Mus. ; ex Fringilla humeralis Lichtenstein, manuscript). 

 IHiemophila] humeralis Sci.at'er and Salvin, Nom. Neotr., 1873, 33. 

 Hiemophila humeraUs Sclater, Cat. Am. Birds, 1862, 359 (Mexico). — Salvin and 



GoDMAN, Biol. Centr.-Am., Aves, i, 1886, 398, pi. .29, fig. 1.— Shaepe, Cat. 



B. Brit. Mus., xii, 1888, 727. 

 {^Aimophila'] tomfraKs Lichtenstein, Nom. Av. Mus. Berol., 1854, 43. 

 [^^knbemagra] humeralis Gray, Hand-list, ii, 1870, 91, no. 7347. 

 A. [mphispiza'] humeralis Ridgway, Man. N. Am. B., 1887, 426. 

 Amphispizaferrai-iperez) Ridgway, Auk, iii, July, 1886, 332 (Chietla, Puebla; coll. 



Nat. Mus. Mexico) ; Proc. U. S. Nat. Mus., ix, 1886, 143. 



AIMOPHILA RUFICAUDA RUFICAUDA (Bonaparte). 

 RTJSSET-TAILED GROUND SPARROW. 



AdnltH {sexes alike). —Head marked with four broad stripes of black 

 or dusky, alternating with three narrow stripes of white or brownish 

 white; back light brownish and rusty, bi'oadly streaked with black; 

 tail cinnamon-brown; lesser wing-coverts and adjacent scapulars cinna- 

 mon-rufous; under parts mainly white, passing into tawny-buff or clay 

 color on flanks, etc. , the chest and sides of breast with feathers gray, 

 edged and margined with white. 



Adidt male.— Liength (skins), 165.10-175.26 (] 70.18); wing, 71.63; 

 tail, 79.25-83.31 (81.28); exposed cuhnen, 15,75; depth of bill at base, 

 10.16; tarsus, 22.86; middle toe, 17.78-18.03 (17.90).' 



' Seven specimens. ^ Five specimens. "Two specimens. 



