26o Field Museum of Natural History — Zoology, Vol. IX. 



Throat and under parts, cream white, shading to pale buff on 

 flanks; crown and back, green, indistinctly streaked with black; 



wing bars, white. (Often difficult to distinguish from female of 

 Black-poll Warbler, D. striata, which resembles it very closely in 

 immature plumage, but has the under parts usually yellowish.) 



Dendroica castauca (immature). 

 Bay-breasted Warbler. 

 See No. 317. 



Throat and under parts, dull white; crown and back, grayish olive; 

 wing bars, white; an oblique white spot on inner webs of two outer 

 tail feathers, rest of tail feathers, without white; under tail coverts, 

 whitish. Dendroica vigor sii {fall, a^id immature). 



Pine Warbler. 

 See No. 323. 



Throat and under parts, whitish, 

 faintly tinged with yellow; breast, 

 with rather indistinctly dusky 

 streaks; crown, grayish olive, usu- 

 ally with an indication of chest- 

 nut; back, grayish olive; rump, 

 olive green; under tail coverts, 

 yellow. Dendroica palmarum. 



Palm Warbler. Red-poll Warbler. 

 See No. 324. 



Tail of Palm Warbler. 



GROUP 4. Wing, 3.15 to 3.75 inches long. 



Under parts, white, faintly yellowish, streaked with brownish 

 black; throat, showing more or less dots or streaks; no white on tail 

 feathers. Seiurus noveboracensis notabilis. 



Grinnell's Water-thrush. 



See No. 327a. 



Throat, white; under parts, white, faintly tinged with tawny; 

 breast and sides of body, streaked with dark brown; throat, not 

 streaked; no white on tail feathers. Seiurus motacilla. 



Louisiana Water-thrush. 



See No. 328. 



