194 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
and Pozo del Rio Grande, Costa Rica; descr. young).—Carrixer, Ann. Car- 
negie Mus., vi, 1910, 635 (Costa Rica; crit.; habits; descr. nest and eggs). 
[Synallaxis] pudica SctaterR and Satvin, Nom. Av. Neotr., 1873, 63, part.— 
Sarre, Hand-list, iii, 1901, 55, part (Honduras, etc.). 
SYNALLAXIS ALBESCENS LATITABUNDA Bangs. 
COSTA RICAN GRAY-BREASTED SYNALLAXIS. 
Similar to S. a. albigularis (Sclater),* of Colombia and Venezuela, 
but smaller, gray of chest averaging deeper and purer (less brownish), 
cinnamon-rufous of occiput more extended, and greater wing-coverts 
brighter cinnamon-rufous. 
Adults (sexes alike) Forehead (back to at least middle of eyes) 
mouse gray, the feathers with indistinct mesial streaks of darker; 
crown, occiput, and nape plain cinnamon-rufous; back, scapulars, 
rump, upper tail-coverts, tail, and remiges plain grayish brown (hair 
brown), the shafts of rectrices darker, the outer webs of secondaries 
and sub-basal portion of that of imner primaries usually slightly 
tinged with cinnamon; lesser and middle wing-coverts uniform cin- 
namon-rufous (somewhat lighter than color of crown and occiput), 
the greater coverts similar but (usually) slightly paler and duller; 
loral region grayish white anteriorly, passing into pale mouse gray 
posteriorly, the suborbital and malar regions similar; auricular region 
deeper mouse gray, narrowly streaked with white; supra-auricular 
region, hindneck, sides of neck, chest, and sides of breast plain 
mouse gray, slightly paler on median portion of chest; chin and 
throat white, the lower throat with a more or less concealed patch 
of dusky or dark slate color, the feathers tipped with white or pale 
gray and marked by a narrow mesial streak of the same; abdomen 
and median portion of lower breast white; sides, flanks, and under 
tail-coverts light broccoli brown or drab; under wing-coverts pale 
pinkish buff, the inner webs of remiges indistinctly edged with the 
same; bill black, the lower-basal portion of mandible whitish (in 
dried skins) ; iris brown; legs and feet light horn color (in dried skins), 
Young.—Above plain brown (between sepia and raw-umber), the 
occipital region tinged (more or less) with more rufescent brown, the 
tail more russet brown, the middle and greater wing-coverts mar- 
gined or edged with russet; lesser wing-coverts cinnamon or russet; 
general color of under parts pale buffy brown, passing into pale 
brownish buff on throat and chin and into brownish buff on flanks, 
the sides of chest and breast shaded with deeper and more grayish 
brown, the abdomen inclining to buffy white. 
Adult male—Length (skins), 129-139 (135); wing, 51.5-54 (52.2); 
tail, 66-76 (68.5); culmen, 11-12 (11.7); tarsus, 18.5-19.5 (18.9); 
middle toe, 12.5-13.5 (12.9) 
a See p. 188. 6 Eight specimens, 
