SYLVICOLIB^—SYLVICOLIN^: TRUE WAEBLERS. 293 



Natural Analysis of Species. 



I. Tail-foathers conspicuously white-blotched. Wiiigs with wliite or yellow on coverts. Head or breast with 

 black. All exclusively Eastern. 

 1 Bluish-ash, below white ; crown and wing-bars yellow ; throat and stripe on side of head black 



chrysoptcra 102 

 1.'. Olive-green ; wings and tail bluish-ash, former with white or yellow bars ; crown and under* 

 parts yellow ; lores black junus 98 



3. Olive-green, below yellow ; throat, breast, and crown-patch black ; forehead yellow . bachmani 103 

 11. Tail-feathers inconspicuously or not blotched with white. No decided wing-markings. No black anywhere. 



a. Crown without colored patch. Wings about half as long again as tail. 



4. Tail with obscure whitish spot on outer feather; under parts white or whitish; upper parts 



olive-green, brighter behind, quite ashy in front. Chiefly Eastern j^crvgrina 109 



. b. Crown with colored patch. Wings shorter. 



5. Crown-patch orange-brown ; tail unmarked; upper parts olive-green, under parts greenish- 



yellow, both nearly uniform. Western and incompletely Eastern a-lata 107, 108 



6. Crown-patch chestnut ; tail unmarked ; upper parts olive-green, growing ashy on head ; under 



parts uniformly yellow. Eastern and incompletely Western rnjicapiUa 106 



7. Crown-patch chestnut ; tail unmarked; above olivaceous-ash, below whitish ; rump and under 



tail-coverts bright yellow ; breast yellowish. Western rivyinhe 105 



8. Crown-patch and upper tail-coverts chestnut ; outer tail-feather with dull white 



* patch; above pale cinereous, below white. Southwestern lucUc 104 



Pass-key to the Species. 



Tail-feather.^ white-blotched — bluish, crown yellow, throat black chrysoptera 102 



— greenish, crown and all under parts yellow pimis 98 



— greenish, crown (partly) and throat black bachmnni 103 



— upper tail-coverts chestnut, crown-patch chestnut hici(e 1U4 



Tail-feathers all unmarked — upper tail-coverts — yellow; crown-patch chestnut i-irrjiniw 105 



— not yellow ; crown-patch — chestnut . . . ruficapilla 106 



— orange-brown . celata 107, 108 



— wanting . . . peregrina 109 



98. H. pi'nus. (Lat. pinus, a pine-tree.) Blue-winged Yellow Warbler. ^, adult: 

 Fore part of crown and entire under parts rich yellow; upper parts yellow-olive, becoming 

 slaty-blue on the wings and tail (system of coloration thus like that of Protonotaria). Wings 

 with two white or yellowish bars ; tail with several large white blotches ; under tail-coverts 

 white ; eyelids bright yellow ; small stripe through eye black ; bill blue-black. Female and 

 young not very dissimilar ; duller and more olivaceous. Length about 4.75 ; extent 7.50 ; 

 wing 2.40-2.50; tail 2.00-2.10; tarsus 0.65; bill 0.45. Eastern United States, north to 

 Massachusetts and Minnesota, west to Kansas, Indian Territory, and Texas ; common, migra- 

 tory, breeding iu its United States range, wintering extralimital. Nest on the ground, eggs 

 4-5, 0.67 X 0.48, white, sprinkled with reddish-brown dots. 



99. H. lawren'cii? (To Geo. N. Lawrence, of N. Y.) Lawrence's Warbler. Like H. 

 pinus ; but a large black patch on the throat and breast, and broad black eye-stripe, reaching 

 over auriculars, as in H. chrysoptera ; thus pinus X chrysoptera, and doubtless a hybrid 

 between the two. New Jersey ; two specimens noted to date. 



100. H. leucobronchia'lis ? (Gr. Xevfcdy, leucos, white, ^poyxos, hrogchos, becoming bronchus, 

 throat.) WiiiTE-THROATED Warbler. hike H. chrysoptera ; but a black bar. through the 

 eye as in pinus, and lacking the black breast-patch of chrysoptera, the entire under parts being 

 white; thus chrysoptera X pinus, and doubtless a hybrid between the two, though up to date a 

 dozen or more specimens have been described, from New England, New York, Pennsylvania, 

 and Michigan. 



101. H. cincinnatien'sis ? (Of Cincinnati, Ohio, where discovered.) Cincinnati Warbler. 

 Like H. pinus in color; bill with evident rictal bristles; no white wing-bars or tail-blotches; 

 no ashy-blue on wings or tail ; concealed black on crown and sides of head like the incom- 

 pleted black mask of Oporornis formosa, with which the bird otlierwise clos(dy agrees in color ; 

 thus curiously being .H". ^jMiMS X 0. /ormosa. Length 4.75 ; wing 2.50; tail 1.85; bill 0.44. 

 One specimen known, Ohio. 



