SYLVICOLIB^ — SYLVICOLIN^ : TBUE WABBLEBS. 293 



Natural Analysis of Species. 



I. Tail-feathers conspicuously white-blotched. Wings with white or yellow on coverts. Head or breast with 

 blacls. All exclusively Eastern, 



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



chrysoptera 10a 



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



parts yellow ; lores black ..... pinus 98 



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

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



t*. 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 peregrina 109 



6. Crown with colored patch. Wings shorter. 



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

 yellow, both nearly uniform. Western and incompletely Eastern celata 107, 108 



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



parts uniformly yellow. Eastern and incompletely Western ruJicapiUa 106 



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



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



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



patch ; above pale cinereous, below white. Southwestern . lucim 104 



Pass-key to the Species. 



Tail-feathers white-blotched — bluish, crown yellow, throat black chrysoptera 102 



— greenish, crown and all under parts yellow pinus 98 



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



— upper tail-coverts chestnut, crown-patch chestnut lucice 104 



Tail-feathers all unmarked — upper tail-coverts — yellow ; crown-patch chestnut . . . Virginia 105 



— not yellow ; crown-patch — chestnut . . . ruflcapilla 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 yeUow-olive, becoming 

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

 with two white or yellowish bars ; taU. 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 in 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. leucolbronchla'lis ? (Gr. XevKos, leucos, white, ^poyxoi, irogchos, becoming bronchus, 

 throat.) White-throated Warbler. Uke H. chrysoptera j 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 S. pinus in color ; biU with evident rietal bristles ; no white wing-bars or taU-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 otherwise closely agrees in color ; 

 thus curiously being iif. ^jwMS X 0. /orTOOsa. Length 4.75; wing 2.50; tail 1.85; biU 0.44. 

 One specimen known, Ohio. 



