NORTH AMERICAN BIRDS. 
20 
Bill moderately acute, robust ; no notch ; culmen straight, its base 
elevated and slightly arched ; bristles not apparent. (Page 21.) Helinaia . 
Bill moderately acute ; robust; no notch ; culmen convex, its base 
not elevated ; bristles apparent. (Page 21.) . . . Helmitherus , 
b. Middle toe and claw considerably shorter than tarsus. 
Bill very acute, its outlines nearly straight ; notch not perceptible ; 
bristles not apparent. (Page 21.) : . . Helminihophaga . 
Bill very acute, its outlines nearly straight ; notch just perceptible ; 
bristles strong. (Page 22.) Parula . 
Sylvicolece. Bill distinctly notched ; rictal bristles strong ; outlines 
generally slightly, curved. (Page 23.) 
Bill acute, gonys slightly concave. (Page 23.) . . . ' Perissoglossa . 
Bill not acute, gonys' convex. (Page 23.) . . . Dendroica . 
GEOTHLYPINiE. 
3. Wings pointed, longer than the nearly even tail. 
Seiurese. 
Above olive-brown ; beneath white with dark streaks. (Page 28.) Seiurus . 
Above olive-green ; beneath yellow without streaks. (Page 29.) Oporornis ■ 
4. Wings rounded, shorter than the graduated tail. 
Geothlypeae. 
Above olive-green ; beneath yellow, without streaks. (Page 29.) Geothlypis. 
. ICTERIANiE. | 
5. Bill very deep and compressed ; tail graduated ; outer toe deeply cleft. 
Icteriese. 
Olive-green above; bright yellow anteriorly beneath. Upper man- 
dible deeper than the lower. (Page 30.) Icteria. 
6. Bill slender, sub-conical, but curved; tail nearly even; outer toe adherent 
for basal half. 
Teretristese. 
Above olive-gray ; beneath whitish posteriorly, and yellow an- 
' teriorly. Cuba. ......... Teretristis . 
SETOPIIAGINyE. 
7. Bill tyrannine. Tail broad, equal to or longer than the wing, and much 
rounded. 
Setophagese. Colors mainly black, red, and white. (Page 31.) 
Tail not longer than the wing. Above black, wing variegated. Setophaga. 
Tail longer than the wing. Above plumbeous, wing unvariegated. 
Mexico. .......... Myxohorm. 
8. Bill sylvicoline. Tail narrow, almost even ; shorter than the wing. 
Myiodiocteae. Colors yellow beneath, olive-green or ashy above. 
Black markings about the head in the £. (Page 30.) . . Myiodiodes, 
9. Bill somewhat parine. Tail equal to the wing, almost even. Mexico. 
Subfamily SYLVICOLINE. 
Genus MNIOTILTA, Vieillot. (Page 19.) 
M. varia. Vieill. Bill with the upper mandible considerably decurved, the lower 
straight. General color of the male black, the feathers broadly edged; with white ; the 
head all round black, with a median stripe in the crown and neck above, a’ superciliary 
and a maxillary one of white. Middle of belly, two conspicuous bands on the wings, 
