GEOTHLYPTS. 925 
The ashy of the crown, in the present species, is more restricted, as 
instead of passing down the occiput, and extending straight across 
between the black cheeks, its outline is rounded behind, less ex- 
tended, and allowing the olive green of the nape to pass forward to 
the dusky eyelids. The under parts are of a more ochry yellow. 
The bill above is paler. The bill is considerably stouter at the base, 
and more curved; the legs, too, decidedly stouter; the middle and 
hind toe longer. The tail appears to be a little shorter, or at least 
not longer than the wings, instead of decidedly longer. 
Smith- \cottee- Sex When 
sonian| tor’s | and Locality. Collected Received from Collected by 
No. No. | Age. : 4 
2,905 on -. |S. Amer. ? (*‘ Califor- 409 8. F. Baird. J. J. Audubon. 
2,367 26 .. | Trinidad. [nia’’? ?) Ate Gn way Mee | OM gre 
562 te .. |S. America? oer £ 
(2,905.) Supposed to be type of Zrichas delafieldii, and also type of Trichas velata, Bair, 
Birds N. Am. 
Geothliypis poliocephala. 
Geothlypis poliocephala, Bairp, n. s. 
? Geothlypis equinoctialis, ScLATER & Sauvin, Ibis 1860, 273 (Guatemala). 
Not of Gu. 
Hab. West coast of Mexico, and Central America ? 
(No. 34,017.) Bill very stout, with the culmen considerably curved from 
the base, and not unlike Jcteria; the depth of bill more than half distance 
from nostrils to tip. Tail considerably longer than the wings, a good deal 
graduated. Wings short, much rounded ; the Ist quill about equal to 9th. 
Above olive green. A narrow frontlet of black, extending over loral region 
to the eye, and curving round, passes a short distance below it. Eyelids 
white. Top of head and nape, and sides behind the eyes, including most of 
ear coverts, ashy. Beneath, including bend of wings, dull yellow; the sides 
paler, and tinged with brown. Inside of wings yellowish-white. Outer pri- 
mary, as usual in the genus, edged with white, the others with olive. Bill 
light brownish above, whitish beneath. 
This specimen is marked male, but isin poor condition. One received from 
Mr. Salvin, from Guatemala, differs a little in having the black continued 
entirely round the eye, but inferiorly not extending behind its posterior ex- 
tremity. There are no white feathers on the eyelids. The sides of head and 
ears are ashy, as in the first specimen. The bill is even stouter, and the 
culmen more curved, than in 34,017, and exhibits a very striking difference 
from that of G. velata. 
Length (34,017), 5.40; wing, 2.20; tail, 2.65; its graduation, .50; difference 
between Ist and 4th quills, .18; bill above, .50, from nostril, .30, from gape, 
-61; depth, .165; tarsus, .87; middle toe and claw, .68; hind toe and claw,.ole 
No. 30,677. Length, 5.35; wing, 2.35; tail, 2.60 (worn) ; bill above, .56, 
15 April, 1865, 
