218 ANALYSIS OP HELMINTHOPHAG^ 



tail-feathers are not, or not conspicuously, blotched with white ; 

 and a mark of all but one of them is a crown-patch of color 

 different from surrounding parts. One of these is Eastern, two 

 are Western, and two are of general dispersion. The males may 

 be recognized, when in perfect plumage, by the following 



Analysis of species 



I. Tail-feathers conspicuously white-blotohed. Wings with white 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 chrysoptera. 



2. Like the last ; '• no black on throat " " leucobronchialia". 



3. Olive-green ; wings and tail bluish-ash, former with white or yel- 



low bars ; crown and under parts yellow ; lores black pinus. 



4. Like the last; "chin, throat, and breast black" "lawrencii". 



5. Olive-green, below yellow; throat, breast, and crown-patch black; 



forehead yellow .bachmani, 



II. 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. 



6. Tail with obscare whitish spot on outer feather; under parts 



white or whitish ; upper parts olive-green, brighter behind, quite 

 ashy iu front. Chiefly Eastern . peregrina. 



b. Crown with colored patch. Wings shorter. 



7. Crown-patch orange-brown ; tail unmarked ; upper parts olive- 



greeu ; under parts greenish-yellow, both nearly uniform. West- 

 ern and incompletely Eastern celata. 



8. Crown-patch chestnut ; tail unmarked ; upper parts olive-green, 



growing ashy on head ; under parts uniformly yellow. Eastern 

 and incompletely Western ruficapilla. 



9. Crown-patch chestnut ; tail unmarked ; above olivaceous-ash, be- 



low whitish; rump and under tail-coverts bright yellow ; breast 



yellowish. Western virginke. 



10. Crown-patch aod upper tail-coverts chestnut ; outer tail-feather 

 with dull white patch ; above pale cinereous, below white. 

 Western lucuB. 



The females and young of Sect. II, at least, require more detailed descrip- 

 tions for their determination in some cases, especially Nos. 7, 8, and 9, which 

 resemble each other quite closely, even when in full plumage. All of them 

 are described in detail in the following pages, with special reference to the 

 characters that distinguish them from each other ; and it is believed that 

 there will be no difficulty experienced in discriminating between them, if the 

 diagnostic points which are given are sufficiently considered. 



