f 
SYLVICOLIDiE — THE WARBLERS. 
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Eeet yellowish-brown ; the two longest under tail-coverts with a blackish. 
longitudinal spot ; the longest tertial almost equal to the longest primary ; 
the shaft of the first tail-feather mostly w T hite ; no green on the plumage ; 
the throat rust-color. **Hab. “ Aleutian Islands.” (Aleutian TitlarJc.) A. cervinus. 
Genus NROCORYS, Sclater. (Page 18.) 
N. spraguei. Above pale grayish-buff, heavily streaked with grayish-black ; beneath 
buffy-white, streaked across the jugulum with dusky ; all the wing-feathers edged with 
whitish; two outer tail-feathers almost wholly white. Wing, 3.20 to 3.30; tail, 2.30 
to 2.50 ; tarsus, .90. Hob. Plains of the Upper Missouri and Saskatchewan. (Missouri 
Skylark.) 
Family SYLVICOLIDjE. — The Warblers. 
Iris brown or hazel. Live usually among /trees or bushes. Nest variously built and 
placed. Eggs always white or whitish, more or less spotted with dusky or reddish. 
Subfamilies. 
A. Bill conical, its bristles very weak, or wanting. 
a. Bill sub-conical, the culmen and commissure nearly straight. 
Sylvicolinee. Eeet weak, not reaching near the end of the tail. Wing 
pointed, considerably longer than ' the nearly even or slightly emargi- 
nated tail. Eeet dark-colored (except in Helmitlierus , Melinaia , and 
Parula). Arboreal. 
Geothlypinae. Feet strong, reaching nearly to end of the tail. Wing 
rounded. Feet pinkish-white. • Terrestrial. (Page 20.) 
b. Bill high and compressed, the culmen and commissure much curved. 
Icterianae. Bill without notch or rictal bristles ; wing much rounded^ 
shorter than the tail. (Page 20.) 
!$• Bill depressed, its bristles strong. 
Setophaginee. Bill, tyrannine , considerably broader than high, the tip 
more or less hooked, and' with a distinct notch. Rictal bristles reaching 
half-way, or more, to the tip. (Page 20.) 
Sections and Genera. 
Bill conical ; its bristles very short , or wanting. 
SYLVICOLIN2E. 
1. Middle toe, with claw, longer than tarsus. 
Mniotilteae. Bill much compressed for terminal half, the lateral outline 
decidedly concave ; culmen and gonys decidedly convex ; commissure 
moderately concave. Rictal bristles very inconspicuous ; notch just 
perceptible. (Page 20.) 
Mniotilta. 
2. Middle toe, with claw, not longer than tarsus. 
Vermivorese. Bill without a distinct notch, or lacking it entirely ; rictal 
bristles wanting, or very minute ; culmen and gonys nearly straight ; bill 
only very moderately compressed. (Page 21.) 
a. Middle toe and claw about equal to tarsus. 
Bill not acute ; culmen and gonys decidedly convex ; notch just 
perceptible ; bristles apparent. (Page 21.) . . . . Protonotaria. 
