260 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
malar region also), narrowly margined with the same; foreneck and 
chest buffy white or very pale buff, the feathers broadly margined 
with black or dusky, producing a squamate effect; rest of under 
parts similar but with mesial buffy or whitish area on each feather 
narrower, the blackish lines submarginal instead of marginal, the 
feathers broadly edged with light grayish olive or grayish brown, 
this gradually increasing (at expense of the whitish or buffy mesial 
stripes and blackish lines) posteriorly, where, on flanks, lower abdo- 
men, and under tail-coverts the light grayish brown predominates; 
under wing-coverts ochraceous-buff, paler on margin of wing; inner 
webs of remiges light cinnamon-rufous, the longer primaries. grayish 
brown terminally; maxilla deep horn brown, darker basally; mandi- 
ble paler, especially toward base; legs and feet horn color or dusky 
(in dried skins). 
Young.—Similar to adults but blackish margins and edgings to 
feathers of lower parts more irregular or broken, and color of back 
more olivaceous (less tawny) brown. 
Adult male—tLength (skins), 219-235 (226); wing, 108.5-123 
(116.9); tail, 93-103.5 (97.4); culmen, 32-37.5 (35.4); tarsus, 20-21.5 
(20.8); middle toe, 15.5-17 (16.5). 
Adult female—Length (skins), 219-225 (222); wing, 108.5-115.5 
(112); tail, 90-98 (94.9); culmen, 29.5-37 (84.4); tarsus, 20-21 
(20.6); middle toe, 16-16.5 (16.2).° 
Western and central Mexico, in States of Sonora (Nuri), Durango 
(Coyotes; El Salto; Ciudid Durango), Guanajuato, San Luis Potosi 
(Sierra de San Luis Potosi), Vera Cruz (alpine zone of Orizaba), 
Puebla (Tenango del Valle; Rio Frio; Ixtaccihuatl; San Salvador el 
Verde), Zacatecas (Plateado), Mexico (near City of Mexico; Temas- 
caltepec), Morelos (Huitzilac), Michoacin (Mt. Tancitaro; Patzcu- 
aro; Quiroga, Lake Patzcuaro; Morelia; Nahudtzin), Jalisco (Sierra 
de Bolafios; Sierra de Nayarit; Zapotlan; Hacienda de San Marcos; 
San Sebastian; Tonila), Colima (Sierra Nevada), Guerrero (Amula; 
Omilteme), and Oaxaca (La Parada; Cerro San Felipe), and Terri- 
tory of Tepic (Santa Teresa). 
Xiphorhynchus leucogaster Swainson, Philos. Mag., new ser., i, 1827, 440 (Temas- 
cdltepec, Mexico; coll. Bullock Mus.). 
X[iphorhynchus] leucogaster Bonaparte, Consp. Av., i, 1850, 208. 
Picolaptes leucogaster LATRESNAYE, Rev. et Mag. Zool., March, 1850, 150.— 
SciateR, Proc. Zool. Soc. Lond., 1858, 297 (La Parada, Oaxaca); Cat. Am. 
Birds, 1862, 166; Cat. Birds Brit. Mus., xv, 1890, 147 (near City of Mexico; 
La Parada, Oaxaca; Ciudid Durango).—Sumicurast, La Naturaleza, v, 1881, 
@ Ten specimens. b Six specimens. 
